diff --git a/README.md b/README.md
index 8dd34347..7b4fc3db 100644
--- a/README.md
+++ b/README.md
@@ -21,11 +21,11 @@ On windows, the program can be compiled with Visual Studio (recommended) or with
 
 =======
 ````
-.\vcpkg install pkgconf wxwidgets[fonts] boost-smart-ptr boost-regex boost-logic boost-pool boost-iterator hunspell --triplet=x64-windows-static
+.\vcpkg install pkgconf wxwidgets[fonts] boost-smart-ptr boost-regex boost-logic boost-pool boost-iterator boost-json hunspell --triplet=x64-windows-static
 ````
 and/or
 ````
-.\vcpkg install pkgconf wxwidgets boost-smart-ptr boost-regex boost-logic boost-pool boost-iterator hunspell --triplet=x86-windows-static
+.\vcpkg install pkgconf wxwidgets boost-smart-ptr boost-regex boost-logic boost-pool boost-iterator boost-json hunspell --triplet=x86-windows-static
 ````
 then, regardless of your choice
 ````
diff --git a/data/en.mse-locale/locale b/data/en.mse-locale/locale
index 68ef3aac..f760d76a 100644
--- a/data/en.mse-locale/locale
+++ b/data/en.mse-locale/locale
@@ -841,6 +841,9 @@ error:
 	can't create file stream:			Failed to create file stream: '%s'
 	can't write image to set:			Failed to write image to set: '%s'
 	can't import image:					Failed to import image: '%s'
+	import missing fields:				
+		The %s file contains the following entries that could not
+		be imported, because no corresponding card field was found: %s
 
 	# Card creation
 	no field with name:					Card doesn't have a field named '%s'
diff --git a/doc/function/new_card.txt b/doc/function/new_card.txt
index 620fd75c..80fa03af 100644
--- a/doc/function/new_card.txt
+++ b/doc/function/new_card.txt
@@ -12,6 +12,7 @@ NOTE: you should use underscores instead of spaces in field names.
 --Parameters--
 ! Parameter	Type							Description
 | @input@	[[type:map]] of field names to field values		Field values to set
+| @ignore_field_not_found@	[[type:boolean]]		Optional. If set to true, key/value pairs that don't correspond to a card field will be ignored instead of throwing.
 
 --Examples--
 > # Create a new card
diff --git a/doc/type/field.txt b/doc/type/field.txt
index cb88089c..a024e7d2 100644
--- a/doc/type/field.txt
+++ b/doc/type/field.txt
@@ -43,10 +43,10 @@ Fields are part of the [[file:style triangle]]:
 | @card list name@	[[type:localized string]]		field name	Alternate name to use for the card list, for example an abbreviation.
 | @card list alignment@	[[type:alignment]]	@left@		Alignment of the card list column.
 | @sort script@		[[type:script]]		 		Alternate way to sort the card list when using this column to sort the list.
-| @construction script@		[[type:script]]		 		Script applied to the value given when creating a card with the new_card function.
+| @import script@		[[type:script]]		 		Script applied to the value given when creating a card with the new_card function. The script may return a map from field names to values.
 			 			 		For example, the pt field should not be initialized directly, since it is a combination of the power field and toughness field.
 			 			 		So if a value is given for pt, it must be redirected to power and toughness like so: {split := split_text(value, match:"/"); [power:split[0], toughness:split[1]]}.
-			 			 		The script must return a map from field names to values. Use the make_map function to dynamically create maps.
+			 			 		Use the make_map function to dynamically create maps.
 
 The @type@ determines what values of this field contain:
 ! Type			Values contain								Displayed as
diff --git a/doc/type/game.txt b/doc/type/game.txt
index 4aaf4bd4..f47ecff7 100644
--- a/doc/type/game.txt
+++ b/doc/type/game.txt
@@ -33,7 +33,7 @@ Such a package contains a [[file:format|data file]] called <tt>game</tt> that ha
 | @default set style@		[[type:indexmap]] of [[type:style]]s	 		Default style for the set fields, can be overridden by the stylesheet.
 | @card fields@			[[type:list]] of [[type:field]]s	 		Fields for each card.
 | @card list color script@	[[type:script]]				from fields	Script that determines the color of an item in the card list. <br/>If not set uses the @card list colors@ property of the first card field that has it.
-| @construction script@		[[type:script]]				 	Script that is applied as the last step in the creation of a card in the new_card function. Must return a map from field names to values. Use the make_map function to dynamically create maps.
+| @import script@		[[type:script]]				 	Script that is applied as the last step in the creation of a card in the new_card function. Must return a map from field names to values. Use the make_map function to dynamically create maps.
 | @statistics dimensions@	[[type:list]] of [[type:statistics dimension]]s		from fields	Dimensions for statistics, a dimension is roughly the same as an axis. <br/>By default all card fields with 'show statistics' set to true are used.
 | @statistics categories@	[[type:list]] of [[type:statistics category]]s		from dimensions	DOC_MSE_VERSION: not used since 0.3.6
 				 					 		Choices shown on the statistics panel. <br/>By default all statistics dimensions are used.
diff --git a/doc/type/locale.txt b/doc/type/locale.txt
index d943204f..280e5624 100644
--- a/doc/type/locale.txt
+++ b/doc/type/locale.txt
@@ -61,5 +61,5 @@ To translate the MSE user interface:
 * Add new keys for game, stylesheet or symbol font specific keys as described above.
 * Save the file, select the new locale from Edit->Preferences.
 * Restart MSE, and make sure everything looks right.
-* Submit the new locale to the [[http://magicseteditor.sourceforge.net/forum/7|MSE forum].
+* Submit the new locale as a pull request to the [[https://github.com/MagicSetEditorPacks/Full-Magic-Pack|Full-Magic-Pack repository].
 * Maintain the locale when new versions of MSE come out. A new version may have new user interface items and therefore new keys.
diff --git a/src/data/field.cpp b/src/data/field.cpp
index 4b1430ab..168b9f04 100644
--- a/src/data/field.cpp
+++ b/src/data/field.cpp
@@ -40,7 +40,7 @@ Field::~Field() {}
 
 void Field::initDependencies(Context& ctx, const Dependency& dep) const {
   sort_script.initDependencies(ctx, dep);
-  construction_script.initDependencies(ctx, dep);
+  import_script.initDependencies(ctx, dep);
 }
 
 IMPLEMENT_REFLECTION(Field) {
@@ -64,7 +64,7 @@ IMPLEMENT_REFLECTION(Field) {
   REFLECT(card_list_allow);
   REFLECT_LOCALIZED(card_list_name);
   REFLECT(sort_script);
-  REFLECT(construction_script);
+  REFLECT(import_script);
   REFLECT_N("card_list_alignment", card_list_align);
 }
 
diff --git a/src/data/field.hpp b/src/data/field.hpp
index e11e1b1e..23db0ae7 100644
--- a/src/data/field.hpp
+++ b/src/data/field.hpp
@@ -60,7 +60,7 @@ public:
   LocalizedString card_list_name;            ///< Name to use in card list.
   Alignment       card_list_align;           ///< Alignment of the card list colummn.
   OptionalScript  sort_script;               ///< The script to use when sorting this, if not the value.
-  OptionalScript  construction_script;       ///< The script to apply to the supplied value, when creating a new card.
+  OptionalScript  import_script;             ///< The script to apply to the supplied value, when creating a new card.
   Dependencies    dependent_scripts;         ///< Scripts that depend on values of this field
   String          package_relative_filename;
   
diff --git a/src/data/format/mse1.cpp b/src/data/format/mse1.cpp
index 9d721104..4cff5cc5 100644
--- a/src/data/format/mse1.cpp
+++ b/src/data/format/mse1.cpp
@@ -51,7 +51,7 @@ SetP MSE1FileFormat::importSet(const String& filename) {
   // file version check
   String format = file.ReadLine();
   if (format.substr(0,8) != _("MTG Set8")) {
-    throw ParseError(_("Expected MSE format version 8\nTo convert files made with older versions of Magic Set Editor:\n  1. Download the latest version 1 from http:://magicsetedtitor.sourceforge.net\n  2. Open the set, then save the set\n  3. Try to open them again in this program."));
+    throw ParseError(_("Expected MSE format version 8\nTo convert files made with older versions of Magic Set Editor:\n  1. Download the latest version 1 from https://magicseteditor.boards.net/page/downloads\n  2. Open the set, then save the set\n  3. Try to open them again in this program."));
   }
   // read general info
   set->value<TextValue>(_("title"))    .value = file.ReadLine();
diff --git a/src/data/game.cpp b/src/data/game.cpp
index 09edff55..b588bba1 100644
--- a/src/data/game.cpp
+++ b/src/data/game.cpp
@@ -49,7 +49,8 @@ IMPLEMENT_REFLECTION(Game) {
   REFLECT_NO_SCRIPT(default_set_style);
   REFLECT_NO_SCRIPT(card_fields);
   REFLECT_NO_SCRIPT(card_list_color_script);
-  REFLECT_NO_SCRIPT(construction_script);
+  REFLECT_NO_SCRIPT(import_script);
+  REFLECT_NO_SCRIPT(json_paths);
   REFLECT_NO_SCRIPT(statistics_dimensions);
   REFLECT_NO_SCRIPT(statistics_categories);
   REFLECT_COMPAT(<308, "pack_item", pack_types);
diff --git a/src/data/game.hpp b/src/data/game.hpp
index 07b6dff7..43852209 100644
--- a/src/data/game.hpp
+++ b/src/data/game.hpp
@@ -42,7 +42,8 @@ public:
   IndexMap<FieldP,StyleP> default_set_style;      ///< Default style for the set fields, because it is often the same
   vector<FieldP>          card_fields;            ///< Fields on each card
   OptionalScript          card_list_color_script; ///< Script that determines the color of items in the card list
-  OptionalScript          construction_script;    ///< Script applied as the last step of the new_card function
+  OptionalScript          import_script;          ///< Script applied as the last step of the new_card function
+  vector<String>          json_paths;             ///< Paths inside JSON files to find the card array
   vector<StatsDimensionP> statistics_dimensions;  ///< (Additional) statistics dimensions
   vector<StatsCategoryP>  statistics_categories;  ///< (Additional) statistics categories
   vector<PackTypeP>       pack_types;             ///< Types of random card packs to generate
diff --git a/src/data/settings.cpp b/src/data/settings.cpp
index 6f9f5bc2..da8b68d0 100644
--- a/src/data/settings.cpp
+++ b/src/data/settings.cpp
@@ -178,13 +178,13 @@ Settings::Settings()
   , internal_scale       (1.0)
   , internal_image_extension(true)
   #if USE_OLD_STYLE_UPDATE_CHECKER
-  , updates_url          (_("http://magicseteditor.sourceforge.net/updates"))
+  , updates_url          (_("https://magicseteditor.boards.net/page/downloads"))
   #endif
-  , package_versions_url (_("http://magicseteditor.sourceforge.net/packages"))
-  , installer_list_url   (_("http://magicseteditor.sourceforge.net/installers"))
+  , package_versions_url (_("https://magicseteditor.boards.net/page/downloads"))
+  , installer_list_url   (_("https://magicseteditor.boards.net/page/downloads"))
   , check_updates        (CHECK_IF_CONNECTED)
   , check_updates_all    (true)
-  , website_url          (_("http://magicseteditor.sourceforge.net/"))
+  , website_url          (_("https://magicseteditor.boards.net/"))
   , install_type         (INSTALL_DEFAULT)
 {}
 
diff --git a/src/gui/about_window.cpp b/src/gui/about_window.cpp
index af99fb4a..ee75fb9b 100644
--- a/src/gui/about_window.cpp
+++ b/src/gui/about_window.cpp
@@ -33,7 +33,7 @@ void AboutWindow::onPaint(wxPaintEvent& ev) {
   draw(dc);
 }
 
-const char* MSE_AUTHORS[] = {"Twan van Laarhoven (twanvl)", "Sean Hunt (coppro)", "Alissa Rao (Lymia)", "haganbmj", "CaiCai (247321453)"};
+const char* MSE_AUTHORS[] = {"Twan van Laarhoven (twanvl)", "Sean Hunt (coppro)", "Alissa Rao (Lymia)", "haganbmj", "CaiCai (247321453)", "Olivier Bocksberger (GenevensiS)" };
 
 void AboutWindow::draw(DC& dc) {
   wxSize ws = GetClientSize();
diff --git a/src/gui/add_csv_window.cpp b/src/gui/add_csv_window.cpp
index bf293e81..893ae061 100644
--- a/src/gui/add_csv_window.cpp
+++ b/src/gui/add_csv_window.cpp
@@ -10,13 +10,14 @@
 #include <sstream>
 #include <regex>
 #include <util/prec.hpp>
+#include <util/window_id.hpp>
 #include <data/game.hpp>
 #include <data/set.hpp>
 #include <data/card.hpp>
 #include <data/stylesheet.hpp>
-#include <gui/add_csv_window.hpp>
-#include <util/window_id.hpp>
 #include <data/action/set.hpp>
+#include <gui/add_csv_window.hpp>
+#include <script/functions/construction_helper.hpp>
 #include <wx/statline.h>
 
 // ----------------------------------------------------------------------------- : AddCSV
@@ -32,6 +33,7 @@ AddCSVWindow::AddCSVWindow(Window* parent, const SetP& set, bool sizer)
   separator_type->Clear();
   separator_type->Append(_LABEL_("add card csv tab"));
   separator_type->Append(_LABEL_("add card csv comma"));
+  separator_type->Append(_LABEL_("add card csv semicolon"));
   separator_type->SetSelection(0);
   setSeparatorType();
   // init sizers
@@ -39,7 +41,7 @@ AddCSVWindow::AddCSVWindow(Window* parent, const SetP& set, bool sizer)
     wxSizer* s = new wxBoxSizer(wxVERTICAL);
     s->Add(new wxStaticText(this, -1, _LABEL_("add card csv sep")), 0, wxALL, 8);
     s->Add(separator_type, 0, wxEXPAND | (wxALL & ~wxTOP), 8);
-    s->Add(new wxStaticText(this, -1, _("  ") + _LABEL_("add card csv file")), 0, wxALL | (wxALL & ~wxTOP), 8);
+    s->Add(new wxStaticText(this, -1, _("  ") + _LABEL_("add card csv file")), 0, wxALL, 8);
     s->Add(file_path, 0, wxEXPAND | (wxALL & ~wxTOP), 8);
     wxSizer* s2 = new wxBoxSizer(wxHORIZONTAL);
       s2->Add(file_browse, 0, wxEXPAND | wxRIGHT, 8);
@@ -55,7 +57,8 @@ AddCSVWindow::AddCSVWindow(Window* parent, const SetP& set, bool sizer)
 void AddCSVWindow::setSeparatorType() {
   int sel = separator_type->GetSelection();
   if (sel == 0) separator = '	';
-  else  separator = ',';
+  else if (sel == 1) separator = ',';
+  else  separator = ';';
 }
 
 void AddCSVWindow::onSeparatorTypeChange(wxCommandEvent&) {
@@ -109,73 +112,87 @@ std::vector<std::string> AddCSVWindow::readCSVRow(const std::string& row) {
       break;
     }
   }
-  // escape " { }
-  for (f = 0; f < fields.size(); ++f) {
-    fields[f] = std::regex_replace(fields[f], std::regex("\""), "\\\"");
-    fields[f] = std::regex_replace(fields[f], std::regex("\\{"), "\\{");
-    fields[f] = std::regex_replace(fields[f], std::regex("\\}"), "\\}");
-  }
   return fields;
 }
 
+bool AddCSVWindow::readCSV(std::ifstream& in, std::vector<String> headers_out, std::vector<std::vector<ScriptValueP>>& table_out) {
+  // Get the rows
+  vector<std::string> raw_rows;
+  std::string raw_row;
+  while (std::getline(in, raw_row)) {
+    raw_rows.push_back(raw_row);
+  }
+  // Check for quoted new line characters
+  vector<std::string> rows;
+  std::string row = "";
+  for (int y = 0; y < raw_rows.size(); ++y) {
+    row = row + raw_rows[y];
+    int quote_count = 0;
+    std::string::size_type pos = 0;
+    while ((pos = row.find("\"", pos)) != std::string::npos) {
+      ++quote_count;
+      ++pos;
+    }
+    if (quote_count % 2 == 0) {
+      if (row.find_first_not_of(' ') != std::string::npos) rows.push_back(row);
+      row = "";
+    } else {
+      row = row + "\n";
+    }
+  }
+  if (rows.size() == 0) {
+    queue_message(MESSAGE_ERROR, _ERROR_1_("import empty file", _("CSV / TSV")));
+    return false;
+  }
+  // Parse headers
+  std::vector<std::string> headers = readCSVRow(rows[0]);
+  for (int x = 0; x < headers.size(); ++x) {
+    String wxstring(headers[x].c_str(), wxConvUTF8);
+    headers_out.push_back(wxstring);
+  }
+  // Parse rows, add to table
+  for (int y = 0; y < rows.size(); ++y) {
+    auto fields = readCSVRow(rows[y]);
+    std::vector<ScriptValueP> values;
+    for (int x = 0; x < fields.size(); ++x) {
+      String wxstring(fields[x].c_str(), wxConvUTF8);
+      values.push_back(to_script(wxstring));
+    }
+    table_out.push_back(values);
+  }
+  return true;
+}
+
 void AddCSVWindow::onOk(wxCommandEvent&) {
   /// Perform the import
-  // Read the file, put it into a table
-  auto in = std::ifstream(file_path->GetValue().ToStdString());
-  if (in.fail()) {
+  wxBusyCursor wait;
+  // Read the file
+  auto file = std::ifstream(file_path->GetValue().ToStdString());
+  if (file.fail()) {
     queue_message(MESSAGE_ERROR, _ERROR_("add card csv file not found"));
     EndModal(wxID_ABORT);
     return;
   }
-  std::vector<std::vector<std::string>> table;
-  std::string row;
-  while (!in.eof()) {
-    std::getline(in, row);
-    if (in.bad() || in.fail()) {
-      break;
-    }
-    auto fields = readCSVRow(row);
-    table.push_back(fields);
+  // Put values into a table
+  std::vector<String> headers;
+  std::vector<std::vector<ScriptValueP>> table;
+  if (!readCSV(file, headers, table)) {
+    EndModal(wxID_ABORT);
+    return;
   }
-  // ensure table is square
-  int count = table[0].size();
-  for (int y = 1; y < table.size(); ++y) {
-    if (table[y].size() != count) {
-      queue_message(MESSAGE_ERROR, _ERROR_1_("add card csv file malformed", wxString::Format(wxT("%i"), y+1)));
-      EndModal(wxID_ABORT);
-      return;
-    }
+  // Check for missing fields
+  String missing_fields;
+  check_table_headers(set->game, headers, _("CSV / TSV"), missing_fields);
+  if (missing_fields.size() > 0) {
+    queue_message(MESSAGE_WARNING, _ERROR_2_("import missing fields", _("CSV / TSV"), missing_fields));
   }
-  // produce script from table
-  std::ostringstream stream;
-  stream << "[";
-  for (int y = 1; y < table.size(); ++y) {
-    stream << "new_card([";
-    for (int x = 0; x < count; ++x) {
-      stream << "\"" << table[0][x] << "\": \"" << table[y][x] << "\"";
-      if (x < count - 1) stream << ",";
-    }
-    stream << "])";
-    if (y < table.size() - 1) stream << ",";
-  }
-  stream << "]";
-  String string(stream.str().c_str(), wxConvUTF8);
-  ScriptP script = parse(string, nullptr, false);
-  Context& ctx = set->getContext();
-  ScriptValueP result = script->eval(ctx, false);
-  // create cards
+  // Produce cards from the table
   vector<CardP> cards;
-  ScriptValueP it = result->makeIterator();
-  while (ScriptValueP item = it->next()) {
-    CardP card = from_script<CardP>(item);
-    // is this a new card?
-    if (contains(set->cards, card) || contains(cards, card)) {
-      // make copy
-      card = make_intrusive<Card>(*card);
-    }
-    cards.push_back(card);
+  if (!cards_from_table(set, headers, table, true, _("CSV / TSV"), cards)) {
+    EndModal(wxID_ABORT);
+    return;
   }
-  // add to set
+  // Add cards to set
   if (!cards.empty()) {
     // TODO: change the name of the action somehow
     set->actions.addAction(make_unique<AddCardAction>(ADD, *set, cards));
@@ -185,7 +202,7 @@ void AddCSVWindow::onOk(wxCommandEvent&) {
 }
 
 BEGIN_EVENT_TABLE(AddCSVWindow, wxDialog)
-EVT_BUTTON(wxID_OK, AddCSVWindow::onOk)
-EVT_BUTTON(ID_CARD_ADD_CSV_BROWSE, AddCSVWindow::onBrowseFiles)
-EVT_CHOICE(ID_CARD_ADD_CSV_SEP, AddCSVWindow::onSeparatorTypeChange)
+  EVT_BUTTON(wxID_OK, AddCSVWindow::onOk)
+  EVT_BUTTON(ID_CARD_ADD_CSV_BROWSE, AddCSVWindow::onBrowseFiles)
+  EVT_CHOICE(ID_CARD_ADD_CSV_SEP, AddCSVWindow::onSeparatorTypeChange)
 END_EVENT_TABLE()
diff --git a/src/gui/add_csv_window.hpp b/src/gui/add_csv_window.hpp
index a6b1785a..dfe70c20 100644
--- a/src/gui/add_csv_window.hpp
+++ b/src/gui/add_csv_window.hpp
@@ -28,11 +28,11 @@ protected:
 	SetP            set;
 	char            separator;
 
+	bool readCSV(std::ifstream& in, std::vector<String> headers_out, std::vector<std::vector<ScriptValueP>>& table_out);
 	std::vector<std::string> readCSVRow(const std::string& row);
 	
-	void setSeparatorType();
-
 	void onSeparatorTypeChange(wxCommandEvent&);
+	void setSeparatorType();
 
 	void onBrowseFiles(wxCommandEvent&);
 
diff --git a/src/gui/add_json_window.cpp b/src/gui/add_json_window.cpp
new file mode 100644
index 00000000..bc08d9eb
--- /dev/null
+++ b/src/gui/add_json_window.cpp
@@ -0,0 +1,262 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) Twan van Laarhoven and the other MSE developers          |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <iomanip>
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <regex>
+#include <util/prec.hpp>
+#include <util/window_id.hpp>
+#include <data/game.hpp>
+#include <data/set.hpp>
+#include <data/card.hpp>
+#include <data/stylesheet.hpp>
+#include <data/action/set.hpp>
+#include <gui/add_json_window.hpp>
+#include <script/functions/construction_helper.hpp>
+#include <wx/statline.h>
+#include <boost/json/src.hpp>
+#include <boost/json.hpp>
+
+// ----------------------------------------------------------------------------- : AddJSON
+
+AddJSONWindow::AddJSONWindow(Window* parent, const SetP& set, bool sizer)
+  : wxDialog(parent, wxID_ANY, _TITLE_("add card json"), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
+  , set(set)
+{
+  // init controls
+  file_path = new wxTextCtrl(this, wxID_ANY, wxEmptyString);
+  file_browse = new wxButton(this, ID_CARD_ADD_JSON_BROWSE, _BUTTON_("browse"));
+  json_type = new wxChoice(this, ID_CARD_ADD_JSON_ARRAY, wxDefaultPosition, wxDefaultSize, 0, nullptr);
+  json_type->Clear();
+  FOR_EACH(type, set->game->json_paths) {
+    int delimiter_pos = type.find("//");
+    json_type->Append(type.substr(0, delimiter_pos).Trim().Trim(false));
+  }
+  json_type->Append(_LABEL_("add card json custom"));
+  json_type->SetSelection(0);
+  card_array_path = new wxTextCtrl(this, wxID_ANY, wxEmptyString);
+  setJSONType();
+  // init sizers
+  if (sizer) {
+    wxSizer* s = new wxBoxSizer(wxVERTICAL);
+    s->Add(new wxStaticText(this, -1, _LABEL_("add card json type")), 0, wxALL, 8);
+    s->Add(json_type, 0, wxEXPAND | (wxALL & ~wxTOP), 8);
+    s->Add(new wxStaticText(this, -1, _LABEL_("add card json path")), 0, wxALL & ~wxTOP, 8);
+    s->Add(card_array_path, 0, wxEXPAND | (wxALL & ~wxTOP), 8);
+    s->Add(new wxStaticText(this, -1, _LABEL_("add card json file")), 0, wxALL, 8);
+    s->Add(file_path, 0, wxEXPAND | (wxALL & ~wxTOP), 8);
+    wxSizer* s2 = new wxBoxSizer(wxHORIZONTAL);
+      s2->Add(file_browse, 0, wxEXPAND | wxRIGHT, 8);
+      s2->Add(CreateButtonSizer(wxOK | wxCANCEL), 1, wxEXPAND, 8);
+    s->Add(s2, 0, wxEXPAND | wxALL, 12);
+    file_browse->SetFocus();
+    s->SetSizeHints(this);
+    SetSizer(s);
+    SetSize(500, 110);
+  }
+}
+
+static ScriptValueP json_to_script(boost::json::value jv) {
+  if (jv == nullptr) return script_nil;
+  else if (jv.is_null()) return script_nil;
+  else if (jv.is_bool()) return to_script(jv.get_bool());
+  else if (jv.is_double()) return to_script(jv.get_double());
+  else if (jv.is_int64()) {
+    int integer = jv.get_int64();
+    return to_script(integer);
+  }
+  else if (jv.is_uint64()) {
+    int integer = jv.get_uint64();
+    return to_script(integer);
+  }
+  else if (jv.is_string()) {
+    std::string stdstring = boost::json::value_to<std::string>(jv);
+    String wxstring(stdstring.c_str(), wxConvUTF8);
+    return to_script(wxstring);
+  }
+  else if (jv.is_array()) {
+    boost::json::array array = jv.get_array();
+    ScriptCustomCollectionP result = make_intrusive<ScriptCustomCollection>();
+    for (int i = 0; i < array.size(); ++i) {
+      boost::json::value jvalue = array[i];
+      ScriptValueP value = json_to_script(jvalue);
+      result->value.push_back(value);
+    }
+    return result;
+  }
+  else if (jv.is_object()) {
+    boost::json::object object = jv.get_object();
+    ScriptCustomCollectionP result = make_intrusive<ScriptCustomCollection>();
+    for (auto it = object.begin(); it != object.end(); ++it) {
+      boost::json::string_view jview = it->key();
+      std::string_view stdview = std::string_view(jview.data(), jview.size());
+      std::string stdstring = { stdview.begin(), stdview.end() };
+      String key(stdstring.c_str(), wxConvUTF8);
+      boost::json::value jvalue = it->value();
+      ScriptValueP value = json_to_script(jvalue);
+      result->key_value[key] = value;
+    }
+    return result;
+  }
+  else {
+    queue_message(MESSAGE_ERROR, _ERROR_("add card json unknown type"));
+    return script_nil;
+  }
+}
+
+void AddJSONWindow::setJSONType() {
+  int sel = json_type->GetSelection();
+  if (sel == json_type->GetCount() - 1) { // Custom type
+    card_array_path->ChangeValue(wxEmptyString);
+    card_array_path->Enable();
+  }
+  else {
+    String selection = json_type->GetString(sel);
+    FOR_EACH(type, set->game->json_paths) {
+      if (type.starts_with(selection)) {
+        int delimiter_pos = type.find("//");
+        card_array_path->ChangeValue(delimiter_pos + 2 < type.Length() ? type.substr(delimiter_pos + 2).Trim().Trim(false) : wxEmptyString);
+        card_array_path->Enable(false);
+        break;
+      }
+    }
+  }
+}
+
+void AddJSONWindow::onJSONTypeChange(wxCommandEvent&) {
+  setJSONType();
+}
+
+void AddJSONWindow::onBrowseFiles(wxCommandEvent&) {
+  wxFileDialog* dlg = new wxFileDialog(this, _TITLE_("add card json file"), settings.default_set_dir, wxEmptyString, _("JSON files|*.json|All files (*.*)|*"), wxFD_OPEN);
+  if (dlg->ShowModal() == wxID_OK) {
+    file_path->SetValue(dlg->GetPath());
+  }
+}
+
+ bool AddJSONWindow::readJSON(std::ifstream& in, std::vector<String>& headers_out, std::vector<std::vector<ScriptValueP>>& table_out) {
+  // Read file
+  std::string input(std::istreambuf_iterator<char>(in), {});
+  boost::json::value jv;
+  try {
+    jv = boost::json::parse(input);
+  } catch (...) {
+    queue_message(MESSAGE_ERROR, _ERROR_("add card json failed to parse"));
+    return false;
+  }
+  // Split path into tokens
+  std::string path = card_array_path->GetValue().ToStdString();
+  std::vector<std::string> tokens;
+  size_t pos = 0;
+  std::string token;
+  while ((pos = path.find(":")) != std::string::npos) {
+    token = path.substr(0, pos);
+    tokens.push_back(token);
+    path.erase(0, pos + 1);
+  }
+  tokens.push_back(path);
+  // Navigate path to card array
+  for (int t = 0; t < tokens.size(); ++t) {
+    if (tokens[t] == "") break;
+    if (!jv.is_object()) {
+      queue_message(MESSAGE_ERROR, _ERROR_("add card json path not valid"));
+      return false;
+    }
+    auto& ov = jv.as_object();
+    jv = ov[tokens[t]];
+    if (jv == nullptr) {
+      queue_message(MESSAGE_ERROR, _ERROR_("add card json path not valid"));
+      return false;
+    }
+  }
+  if (!jv.is_array()) {
+    queue_message(MESSAGE_ERROR, _ERROR_("add card json path not valid"));
+    return false;
+  }
+  auto& card_array = jv.as_array();
+  size_t count = card_array.size();
+  if (count == 0) {
+    queue_message(MESSAGE_ERROR, _ERROR_("add card json empty array"));
+    return false;
+  }
+  auto& card = card_array[0];
+  if (!card.is_object()) {
+    queue_message(MESSAGE_ERROR, _ERROR_("add card json path not valid"));
+    return false;
+  }
+  // Get headers
+  for (int i = 0; i < count; ++i) {
+    auto& card = card_array[i].as_object();
+    for (auto it = card.begin(); it != card.end(); ++it) {
+      boost::json::string_view jview = it->key();
+      std::string_view stdview = std::string_view(jview.data(), jview.size());
+      std::string stdstring = { stdview.begin(), stdview.end() };
+      String key(stdstring.c_str(), wxConvUTF8);
+      if (std::find(headers_out.begin(), headers_out.end(), key) == headers_out.end()) {
+        headers_out.push_back(key);
+      }
+    }
+  }
+  // Parse cards, add to table
+  for (int i = 0; i < count; ++i) {
+    std::vector<ScriptValueP> row;
+    auto& card = card_array[i].as_object();
+    for (int h = 0; h < headers_out.size(); ++h) {
+      auto& value = card[headers_out[h].ToStdString()];
+      row.push_back(json_to_script(value));
+    }
+    table_out.push_back(row);
+  }
+  return true;
+}
+
+void AddJSONWindow::onOk(wxCommandEvent&) {
+  /// Perform the import
+  wxBusyCursor wait;
+  // Read the file
+  auto file = std::ifstream(file_path->GetValue().ToStdString());
+  if (file.fail()) {
+    queue_message(MESSAGE_ERROR, _ERROR_("add card json file not found"));
+    EndModal(wxID_ABORT);
+    return;
+  }
+  // Put values into a table
+  std::vector<String> headers;
+  std::vector<std::vector<ScriptValueP>> table;
+  if (!readJSON(file, headers, table)) {
+    EndModal(wxID_ABORT);
+    return;
+  }
+  // Check for missing fields
+  String missing_fields;
+  check_table_headers(set->game, headers, _("JSON"), missing_fields);
+  if (missing_fields.size() > 0) {
+    queue_message(MESSAGE_WARNING, _ERROR_2_("import missing fields", _("JSON"), missing_fields));
+  }
+  // Produce cards from the table
+  vector<CardP> cards;
+  if (!cards_from_table(set, headers, table, true, _("JSON"), cards)) {
+    EndModal(wxID_ABORT);
+    return;
+  }
+  // Add cards to set
+  if (!cards.empty()) {
+    // TODO: change the name of the action somehow
+    set->actions.addAction(make_unique<AddCardAction>(ADD, *set, cards));
+  }
+  // Done
+  EndModal(wxID_OK);
+}
+
+BEGIN_EVENT_TABLE(AddJSONWindow, wxDialog)
+  EVT_BUTTON(wxID_OK, AddJSONWindow::onOk)
+  EVT_BUTTON(ID_CARD_ADD_JSON_BROWSE, AddJSONWindow::onBrowseFiles)
+  EVT_CHOICE(ID_CARD_ADD_JSON_ARRAY, AddJSONWindow::onJSONTypeChange)
+END_EVENT_TABLE()
diff --git a/src/gui/add_json_window.hpp b/src/gui/add_json_window.hpp
new file mode 100644
index 00000000..71e2140e
--- /dev/null
+++ b/src/gui/add_json_window.hpp
@@ -0,0 +1,39 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) Twan van Laarhoven and the other MSE developers          |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+#pragma once
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+
+DECLARE_POINTER_TYPE(Set);
+
+// ----------------------------------------------------------------------------- : AddJSONWindow
+
+/// A window for selecting a JSON file, and importing cards from it.
+class AddJSONWindow : public wxDialog {
+public:
+  AddJSONWindow(Window* parent, const SetP& set, bool sizer);
+
+protected:
+  DECLARE_EVENT_TABLE();
+
+  wxChoice*       json_type;
+  wxTextCtrl*     card_array_path, *file_path;
+  wxButton*       file_browse;
+  SetP            set;
+
+  bool readJSON(std::ifstream& in, std::vector<String>& headers_out, std::vector<std::vector<ScriptValueP>>& table_out);
+
+  void onJSONTypeChange(wxCommandEvent&);
+  void setJSONType();
+
+  void onBrowseFiles(wxCommandEvent&);
+
+  void onOk(wxCommandEvent&);
+
+};
diff --git a/src/gui/control/card_list.cpp b/src/gui/control/card_list.cpp
index 3ccc5a8b..bec03c4f 100644
--- a/src/gui/control/card_list.cpp
+++ b/src/gui/control/card_list.cpp
@@ -11,7 +11,8 @@
 #include <gui/control/card_list_column_select.hpp>
 #include <gui/set/window.hpp> // for sorting all cardlists in a window
 #include <gui/util.hpp>
-#include <gui/add_csv_window.hpp>
+#include <gui/add_csv_window.hpp>
+#include <gui/add_json_window.hpp>
 #include <data/game.hpp>
 #include <data/field.hpp>
 #include <data/field/choice.hpp>
@@ -190,6 +191,15 @@ bool CardListBase::doAddCSV() {
   }
   return false;
 }
+
+bool CardListBase::doAddJSON() {
+  AddJSONWindow wnd(this, set, true);
+  if (wnd.ShowModal() == wxID_OK) {
+    // The actual adding is done in this window's onOk function
+    return true;
+  }
+  return false;
+}
 
 // ----------------------------------------------------------------------------- : CardListBase : Building the list
 
diff --git a/src/gui/control/card_list.hpp b/src/gui/control/card_list.hpp
index 4d5b77ed..c8f3c32b 100644
--- a/src/gui/control/card_list.hpp
+++ b/src/gui/control/card_list.hpp
@@ -77,7 +77,8 @@ public:
   bool doCopy() override;
   bool doPaste() override;
   bool doDelete() override;
-  bool doAddCSV();
+  bool doAddCSV();
+  bool doAddJSON();
 
   // --------------------------------------------------- : Set actions
   
diff --git a/src/gui/set/cards_panel.cpp b/src/gui/set/cards_panel.cpp
index dbaea437..0263d035 100644
--- a/src/gui/set/cards_panel.cpp
+++ b/src/gui/set/cards_panel.cpp
@@ -39,7 +39,7 @@ CardsPanel::CardsPanel(Window* parent, int id)
   notes       = new TextCtrl(nodes_panel, ID_NOTES, true);
   collapse_notes = new HoverButton(nodes_panel, ID_COLLAPSE_NOTES, _("btn_collapse"), Color(), false);
   collapse_notes->SetExtraStyle(wxWS_EX_PROCESS_UI_UPDATES);
-  filter    = nullptr;
+  filter      = nullptr;
   editor->next_in_tab_order = card_list;
   // init sizer for notes panel
   wxSizer* sn = new wxBoxSizer(wxVERTICAL);
@@ -69,12 +69,13 @@ CardsPanel::CardsPanel(Window* parent, int id)
     add_menu_item_tr(menuCard, ID_CARD_NEXT, nullptr, "next card");
     add_menu_item_tr(menuCard, ID_CARD_SEARCH, nullptr, "search cards");
     menuCard->AppendSeparator();
-    add_menu_item_tr(menuCard, ID_CARD_ADD, "card_add", "add_card");
     insertManyCardsMenu = add_menu_item_tr(menuCard, ID_CARD_ADD_MULT, "card_add_multiple", "add cards");
     // NOTE: space after "Del" prevents wx from making del an accellerator
     // otherwise we delete a card when delete is pressed inside the editor
     // Adding a space never hurts, please keep it just to be safe.
     add_menu_item(menuCard, ID_CARD_ADD_CSV, "card_add_multiple", _MENU_("add card csv") + _(" "), _HELP_("add card csv"));
+    add_menu_item(menuCard, ID_CARD_ADD_JSON, "card_add_multiple", _MENU_("add card json") + _(" "), _HELP_("add card json"));
+    add_menu_item_tr(menuCard, ID_CARD_ADD, "card_add", "add_card");
     add_menu_item(menuCard, ID_CARD_REMOVE, "card_del", _MENU_("remove card")+_(" "), _HELP_("remove card"));
     menuCard->AppendSeparator();
     auto menuRotate = new wxMenu();
@@ -98,7 +99,31 @@ CardsPanel::CardsPanel(Window* parent, int id)
     menuFormat->Append(insertSymbolMenu);
   
   toolAddCard = nullptr;
-}
+}
+
+void CardsPanel::updateCardCounts() {
+  if (counts) {
+    if (card_list && set) {
+      int selected = card_list->GetSelectedItemCount();
+      int filtered = card_list->GetItemCount();
+      int total = set->cards.size();
+      if (filtered == total) {
+        counts->SetLabel(_TOOL_2_("card counts 2",
+          wxString::Format(wxT("%i"), selected),
+          wxString::Format(wxT("%i"), total)));
+      }
+      else {
+        counts->SetLabel(_TOOL_3_("card counts 3",
+          wxString::Format(wxT("%i"), selected),
+          wxString::Format(wxT("%i"), filtered),
+          wxString::Format(wxT("%i"), total)));
+      }
+      
+    } else {
+      counts->SetLabel(_(""));
+    }
+  }
+}
 
 void CardsPanel::updateNotesPosition() {
   wxSize editor_size = editor->GetBestSize();
@@ -205,9 +230,12 @@ void CardsPanel::initUI(wxToolBar* tb, wxMenuBar* mb) {
   // Filter/search textbox
   tb->AddSeparator();
   assert(!filter);
-  filter = new FilterCtrl(tb, ID_CARD_FILTER, _LABEL_("search cards"), _HELP_("search_cards_control"));
+  filter = new FilterCtrl(tb, ID_CARD_FILTER, _TOOL_("search cards"), _HELP_("search cards control"));
   filter->setFilter(filter_value);
-  tb->AddControl(filter);
+  tb->AddControl(filter);
+  counts = new wxStaticText(tb, ID_CARD_COUNTER, _(""));
+  updateCardCounts();
+  tb->AddControl(counts);
   tb->Realize();
   // Menus
   mb->Insert(2, menuCard,   _MENU_("cards"));
@@ -224,6 +252,7 @@ void CardsPanel::destroyUI(wxToolBar* tb, wxMenuBar* mb) {
   tb->DeleteTool(ID_CARD_ADD);
   tb->DeleteTool(ID_CARD_REMOVE);
   tb->DeleteTool(ID_CARD_ROTATE);
+  tb->DeleteTool(ID_CARD_COUNTER);
   // remember the value in the filter control, because the card list remains filtered
   // the control is destroyed by DeleteTool
   filter_value = filter->getFilterString();
@@ -282,7 +311,8 @@ void CardsPanel::onUpdateUI(wxUpdateUIEvent& ev) {
       break;
     }
 #endif
-  }
+  }
+  updateCardCounts();
 }
 
 void CardsPanel::onMenuOpen(wxMenuEvent& ev) {
@@ -315,6 +345,9 @@ void CardsPanel::onCommand(int id) {
     case ID_CARD_ADD_CSV:
       card_list->doAddCSV();
       break;
+    case ID_CARD_ADD_JSON:
+      card_list->doAddJSON();
+      break;
     case ID_CARD_REMOVE:
       card_list->doDelete();
       break;
diff --git a/src/gui/set/cards_panel.hpp b/src/gui/set/cards_panel.hpp
index 9971ec30..44c9060e 100644
--- a/src/gui/set/cards_panel.hpp
+++ b/src/gui/set/cards_panel.hpp
@@ -87,9 +87,12 @@ private:
   TextCtrl*         notes;
   HoverButton*      collapse_notes;
   FilterCtrl*       filter;
-  String            filter_value; // value of filter, need separate variable because the control is destroyed
+  String            filter_value; // value of filter, need separate variable because the control is destroyed
+  wxStaticText*     counts;
   bool              notes_below_editor;
-  
+
+  /// Update card counts
+  void updateCardCounts();
   /// Move the notes panel below the editor or below the card list
   void updateNotesPosition();
   // before Layout, call updateNotesPosition.
diff --git a/src/script/functions/construction.cpp b/src/script/functions/construction.cpp
index 1cf1e4c0..a8d4ffe6 100644
--- a/src/script/functions/construction.cpp
+++ b/src/script/functions/construction.cpp
@@ -9,6 +9,7 @@
 #include <util/prec.hpp>
 #include <script/functions/functions.hpp>
 #include <script/functions/util.hpp>
+#include <script/functions/construction_helper.hpp>
 #include <data/field.hpp>
 #include <data/field/text.hpp>
 #include <data/field/choice.hpp>
@@ -20,72 +21,11 @@
 #include <data/card.hpp>
 #include <util/error.hpp>
 
-// ----------------------------------------------------------------------------- : Helper functions
-
-static Value* get_container(GameP& game, CardP& card, String key_name) {
-  // find value container to update
-  IndexMap<FieldP, ValueP>::const_iterator value_it = card->data.find(key_name);
-  if (value_it == card->data.end()) {
-    // look among alternate names
-    map<String, String>::iterator alt_name_it = game->card_fields_alt_names.find(unified_form(key_name));
-    if (alt_name_it != game->card_fields_alt_names.end()) {
-      value_it = card->data.find(alt_name_it->second);
-    }
-  }
-  if (value_it == card->data.end()) {
-    throw ScriptError(_ERROR_1_("no field with name", key_name));
-  }
-  return value_it->get();
-}
-
-static void set_container(Value* container, ScriptValueP& value, String key_name) {
-  // set the given value into the container
-  if (TextValue* tvalue = dynamic_cast<TextValue*>(container)) {
-    tvalue->value = value->toString();
-  }
-  else if (ChoiceValue* cvalue = dynamic_cast<ChoiceValue*>(container)) {
-    cvalue->value = value->toString();
-  }
-  else if (PackageChoiceValue* pvalue = dynamic_cast<PackageChoiceValue*>(container)) {
-    pvalue->package_name = value->toString();
-  }
-  else if (ColorValue* cvalue = dynamic_cast<ColorValue*>(container)) {
-    cvalue->value = value->toColor();
-  }
-  else if (ImageValue* ivalue = dynamic_cast<ImageValue*>(container)) {
-    wxFileName fname(static_cast<ExternalImage*>(value.get())->toString());
-    ivalue->filename = LocalFileName::fromReadString(fname.GetName(), "");
-  }
-  else {
-    throw ScriptError(_ERROR_1_("can't set value", key_name));
-  }
-}
-
-static bool set_builtin_container(GameP& game, CardP& card, ScriptValueP& value, String key_name) {
-  // check if the given value is for a built-in field, if found set it and return true
-  key_name = unified_form(key_name);
-  if (key_name == _("notes") || key_name == _("note")) {
-    card->notes = value->toString();
-    return true;
-  } else if (key_name == _("style") || key_name == _("stylesheet") || key_name == _("template")) {
-    if (trim(value->toString()) != wxEmptyString) card->stylesheet = StyleSheet::byGameAndName(*game, value->toString());
-    return true;
-  }
-  // else if (key_name == _("id") || key_name == _("multiverse_id")) {
-  //  card->id = value->toString();
-  //  return true;
-  //}
-  
-  //styling_data;
-  //linked_card;
-  //linked_relation_1;
-  return false;
-}
-
 // ----------------------------------------------------------------------------- : new_card
 
 SCRIPT_FUNCTION(new_card) {
-  SCRIPT_PARAM(GameP, game);
+  SCRIPT_PARAM(GameP, game);
+  SCRIPT_OPTIONAL_PARAM_(bool, ignore_field_not_found);
   // create a new card object
   CardP new_card = make_intrusive<Card>(*game);
   // iterate on the given key/value pairs
@@ -94,31 +34,42 @@ SCRIPT_FUNCTION(new_card) {
   ScriptValueP key;
   while (ScriptValueP value = it->next(&key)) {
     assert(key);
+    if (key == script_nil) continue;
     String key_name = key->toString();
     // check if the given value is for a built-in field
     if (set_builtin_container(game, new_card, value, key_name)) continue;
     // find the field value (container) that corresponds to the given value
-    Value* container = get_container(game, new_card, key_name);
+    Value* container = get_container(game, new_card, key_name, ignore_field_not_found);
+    if (container == nullptr) continue;
     FieldP field = container->fieldP;
     // if the field has a construction script, set the value and card context variables to be the given value and this card, run script
-    if (field->construction_script) {
+    if (field->import_script) {
       ScriptValueP ctx_value = ctx.getVariableOpt(SCRIPT_VAR_value);
       ScriptValueP ctx_card =  ctx.getVariableOpt(SCRIPT_VAR_card);
       ctx.setVariable(SCRIPT_VAR_value, value);
       ctx.setVariable(SCRIPT_VAR_card,  to_script(new_card));
-      ScriptValueP script_input = field->construction_script.invoke(ctx, true);
-      // iterate on the key/value pairs given by the script
-      ScriptValueP script_it = script_input->makeIterator();
-      ScriptValueP script_key;
-      while (ScriptValueP script_value = script_it->next(&script_key)) {
-        assert(script_key);
-        String script_key_name = script_key->toString();
-        // check if the script value is for a built-in field
-        if (set_builtin_container(game, new_card, script_value, script_key_name)) continue;
-        // find the field value that corresponds to the script value
-        Value* script_container = get_container(game, new_card, script_key_name);
-        // set the field value to the script value
-        set_container(script_container, script_value, script_key_name);
+      ScriptValueP script_input = field->import_script.invoke(ctx, true);
+      // if the script result is a collection, iterate on the key/value pairs
+      // treat the keys as field names and the values as what to populate those fields with
+      if (script_input->type() == SCRIPT_COLLECTION) {
+        ScriptValueP script_it = script_input->makeIterator();
+        ScriptValueP script_key;
+        while (ScriptValueP script_value = script_it->next(&script_key)) {
+          assert(script_key);
+          if (script_key == script_nil) continue;
+          String script_key_name = script_key->toString();
+          // check if the script value is for a built-in field
+          if (set_builtin_container(game, new_card, script_value, script_key_name)) continue;
+          // find the field value that corresponds to the script value
+          Value* script_container = get_container(game, new_card, script_key_name, ignore_field_not_found);
+          if (script_container == nullptr) continue;
+          // set the field value to the script value
+          set_container(script_container, script_value, script_key_name);
+        }
+      }
+      // if the script result is not a collection, simply set the field value to the script value
+      else {
+        set_container(container, script_input, key_name);
       }
       // restore old value and card context variables
       if (ctx_value) ctx.setVariable(SCRIPT_VAR_value, ctx_value);
@@ -130,22 +81,29 @@ SCRIPT_FUNCTION(new_card) {
     }
   }
   // if the game has a construction script, set the card context variable to be this card, run script
-  if (game->construction_script) {
+  if (game->import_script) {
     ScriptValueP ctx_card = ctx.getVariableOpt(SCRIPT_VAR_card);
     ctx.setVariable(SCRIPT_VAR_card, to_script(new_card));
-    ScriptValueP script_input = game->construction_script.invoke(ctx, true);
-    // iterate on the key/value pairs given by the script
-    ScriptValueP script_it = script_input->makeIterator();
-    ScriptValueP script_key;
-    while (ScriptValueP script_value = script_it->next(&script_key)) {
-      assert(script_key);
-      String script_key_name = script_key->toString();
-      // check if the script value is for a built-in field
-      if (set_builtin_container(game, new_card, script_value, script_key_name)) continue;
-      // find the field value that corresponds to the script value
-      Value* script_container = get_container(game, new_card, script_key_name);
-      // set the field value to the script value
-      set_container(script_container, script_value, script_key_name);
+    ScriptValueP script_input = game->import_script.invoke(ctx, true);
+    if (script_input->type() == SCRIPT_COLLECTION) {
+      // iterate on the key/value pairs given by the script
+      ScriptValueP script_it = script_input->makeIterator();
+      ScriptValueP script_key;
+      while (ScriptValueP script_value = script_it->next(&script_key)) {
+        assert(script_key);
+        if (script_key == script_nil) continue;
+        String script_key_name = script_key->toString();
+        // check if the script value is for a built-in field
+        if (set_builtin_container(game, new_card, script_value, script_key_name)) continue;
+        // find the field value that corresponds to the script value
+        Value* script_container = get_container(game, new_card, script_key_name, ignore_field_not_found);
+        if (script_container == nullptr) continue;
+        // set the field value to the script value
+        set_container(script_container, script_value, script_key_name);
+      }
+    }
+    else {
+      queue_message(MESSAGE_ERROR, _ERROR_("game import script not map"));
     }
     // restore old context card
     if (ctx_card) ctx.setVariable(SCRIPT_VAR_card, ctx_card);
diff --git a/src/script/functions/construction_helper.hpp b/src/script/functions/construction_helper.hpp
new file mode 100644
index 00000000..c637fe49
--- /dev/null
+++ b/src/script/functions/construction_helper.hpp
@@ -0,0 +1,160 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) Twan van Laarhoven and the other MSE developers          |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+#include <data/field/text.hpp>
+#include <data/field/choice.hpp>
+#include <data/field/package_choice.hpp>
+#include <data/field/color.hpp>
+#include <data/field/image.hpp>
+#include <data/action/set.hpp>
+#include <data/game.hpp>
+#include <data/set.hpp>
+#include <data/stylesheet.hpp>
+#include <data/card.hpp>
+#include <util/error.hpp>
+
+// ----------------------------------------------------------------------------- : Helper functions
+
+static Value* get_container(GameP& game, CardP& card, String key_name, bool ignore_field_not_found) {
+  // find value container to update
+  IndexMap<FieldP, ValueP>::const_iterator value_it = card->data.find(key_name);
+  if (value_it == card->data.end()) {
+    // look among alternate names
+    map<String, String>::iterator alt_name_it = game->card_fields_alt_names.find(unified_form(key_name));
+    if (alt_name_it != game->card_fields_alt_names.end()) {
+      value_it = card->data.find(alt_name_it->second);
+    }
+  }
+  if (value_it == card->data.end()) {
+    if (ignore_field_not_found) return nullptr;
+    throw ScriptError(_ERROR_1_("no field with name", key_name));
+  }
+  return value_it->get();
+}
+
+static void set_container(Value* container, ScriptValueP& value, String key_name) {
+  // set the given value into the container
+  if (TextValue* tvalue = dynamic_cast<TextValue*>(container)) {
+    tvalue->value = value->toString();
+  }
+  else if (ChoiceValue* cvalue = dynamic_cast<ChoiceValue*>(container)) {
+    cvalue->value = value->toString();
+  }
+  else if (PackageChoiceValue* pvalue = dynamic_cast<PackageChoiceValue*>(container)) {
+    pvalue->package_name = value->toString();
+  }
+  else if (ColorValue* cvalue = dynamic_cast<ColorValue*>(container)) {
+    cvalue->value = value->toColor();
+  }
+  else if (ImageValue* ivalue = dynamic_cast<ImageValue*>(container)) {
+    wxFileName fname(static_cast<ExternalImage*>(value.get())->toString());
+    ivalue->filename = LocalFileName::fromReadString(fname.GetName(), "");
+  }
+  else {
+    throw ScriptError(_ERROR_1_("can't set value", key_name));
+  }
+}
+
+static bool set_builtin_container(GameP& game, CardP& card, ScriptValueP& value, String key_name) {
+  // check if the given value is for a built-in field, if found set it and return true
+  key_name = unified_form(key_name);
+  if (key_name == _("notes") || key_name == _("note")) {
+    card->notes = value->toString();
+    return true;
+  } else if (key_name == _("style") || key_name == _("stylesheet") || key_name == _("template")) {
+    if (trim(value->toString()) != wxEmptyString) card->stylesheet = StyleSheet::byGameAndName(*game, value->toString());
+    return true;
+  }
+  // else if (key_name == _("id") || key_name == _("multiverse_id")) {
+  //  card->id = value->toString();
+  //  return true;
+  //}
+  
+  //styling_data;
+  //linked_card;
+  //linked_relation_1;
+  return false;
+}
+
+static bool check_table_headers(GameP& game, std::vector<String>& headers, const String& file_extension, String& missing_fields_out) {
+  if (headers.size() == 0) {
+    queue_message(MESSAGE_ERROR, _("Empty headers given"));
+    return false;
+  }
+  for (int x = 0; x < headers.size(); ++x) {
+    String key_name = headers[x];
+    if ( game->card_fields_alt_names.find(unified_form(key_name)) == game->card_fields_alt_names.end()
+      || key_name == _("notes")
+      || key_name == _("note")
+      || key_name == _("style")
+      || key_name == _("stylesheet")
+      || key_name == _("template")
+      || key_name == _("id")
+      || key_name == _("uid")
+      || key_name == _("multiverse_id")
+      || key_name == _("linked_card")
+      || key_name == _("linked_card_1")
+      || key_name == _("linked_card_2")
+      || key_name == _("linked_card_3")
+      || key_name == _("linked_card_4")
+      || key_name == _("linked_relation")
+      || key_name == _("linked_relation_1")
+      || key_name == _("linked_relation_2")
+      || key_name == _("linked_relation_3")
+      || key_name == _("linked_relation_4")
+      || key_name == _("link_relation")
+      || key_name == _("link_relation_1")
+      || key_name == _("link_relation_2")
+      || key_name == _("link_relation_3")
+      || key_name == _("link_relation_4")
+    ) {
+      missing_fields_out += _("\n   ") + key_name;
+    }
+  }
+  return true;
+}
+
+static bool cards_from_table(SetP& set, vector<String>& headers, std::vector<std::vector<ScriptValueP>>& table, bool ignore_field_not_found, const String& file_extension, vector<CardP>& cards_out) {
+  // ensure table is square
+  int count = headers.size();
+  for (int y = 0; y < table.size(); ++y) {
+    if (table[y].size() != count) {
+      queue_message(MESSAGE_ERROR, _ERROR_2_("import file malformed", file_extension, wxString::Format(wxT("%i"), y+1)));
+      return false;
+    }
+  }
+  // produce cards from table
+  Context& ctx = set->getContext();
+  ScriptValueP new_card_function = ctx.getVariable("new_card");
+  ScriptValueP ctx_input = ctx.getVariableOpt(SCRIPT_VAR_input);
+  ScriptValueP ctx_ignore = ctx.getVariableOpt("ignore_field_not_found");
+  ctx.setVariable("ignore_field_not_found", to_script(ignore_field_not_found));
+  for (int y = 0; y < table.size(); ++y) {
+    ScriptCustomCollectionP field_map = make_intrusive<ScriptCustomCollection>();
+    for (int x = 0; x < count; ++x) {
+      // check if value is worth writing
+      if (table[y][x] != script_nil) {
+        field_map->key_value[headers[x]] = table[y][x];
+      }
+    }
+    ctx.setVariable(SCRIPT_VAR_input, field_map);
+    CardP card = from_script<CardP>(new_card_function->eval(ctx));
+    // is this a new card?
+    if (contains(set->cards, card) || contains(cards_out, card)) {
+      // make copy
+      card = make_intrusive<Card>(*card);
+    }
+    cards_out.push_back(card);
+  }
+  if (ctx_input) ctx.setVariable(SCRIPT_VAR_input, ctx_input);
+  if (ctx_ignore) ctx.setVariable("ignore_field_not_found", ctx_ignore);
+  return true;
+}
+
+
diff --git a/src/util/locale.hpp b/src/util/locale.hpp
index 164837dd..93476aff 100644
--- a/src/util/locale.hpp
+++ b/src/util/locale.hpp
@@ -87,6 +87,13 @@ String tr(const String&, const String& subcat, const String& key, DefaultLocaleF
 /// A localized string for tooltip text, with 1 argument (printf style)
 #define _HELP_1_(s,a)    format_string(_HELP_(s),    a)
 
+/// A localized string for tooltip labels, with 1 argument (printf style)
+#define _TOOL_1_(s,a)     format_string(_TOOL_(s),   a)
+/// A localized string for tooltip labels, with 2 argument (printf style)
+#define _TOOL_2_(s,a,b)   format_string(_TOOL_(s),   a, b)
+/// A localized string for tooltip labels, with 3 argument (printf style)
+#define _TOOL_3_(s,a,b,c) format_string(_TOOL_(s),   a, b, c)
+
 /// A localized string for tooltip text, with 1 argument (printf style)
 #define _TOOLTIP_1_(s,a)  format_string(_TOOLTIP_(s), a)
 
diff --git a/src/util/window_id.hpp b/src/util/window_id.hpp
index 77cffbf8..0409ae01 100644
--- a/src/util/window_id.hpp
+++ b/src/util/window_id.hpp
@@ -111,6 +111,9 @@ enum ChildMenuID {
   ID_CARD_ADD_CSV,
   ID_CARD_ADD_CSV_SEP,
   ID_CARD_ADD_CSV_BROWSE,
+  ID_CARD_ADD_JSON,
+  ID_CARD_ADD_JSON_ARRAY,
+  ID_CARD_ADD_JSON_BROWSE,
 
   // Keyword menu
   ID_KEYWORD_ADD = 6101,
@@ -188,6 +191,7 @@ enum ChildMenuID {
   // On cards panel
   ID_COLLAPSE_NOTES = 8001,
   ID_CARD_FILTER,
+  ID_CARD_COUNTER,
   
   // Style panel
   ID_STYLE_USE_FOR_ALL = 8011,
diff --git a/tools/doc/extra/overview.hpp b/tools/doc/extra/overview.hpp
index 85a7e1e4..3ecfb468 100644
--- a/tools/doc/extra/overview.hpp
+++ b/tools/doc/extra/overview.hpp
@@ -17,7 +17,7 @@ The MSE source code is subdivided into several directories, with the following m
  - <tt>gfx</tt>:  Graphics related functions, again mostly independent of MSE.
                   This directory contains algorithms for image blending, scaling, and bezier curve functions.
  - <tt>data</tt>: Data structures, like sets, cards, symbols, etc.
-                  These data structures are documented in the <a href="http://magicseteditor.sourceforge.net/extending">'Extending MSE'</a> section of the official documentation.
+                  These data structures are documented in the <a href="https://mseverse.miraheze.org/wiki/Dev:Data_types">'Data types'</a> section of the documentation.
      - <tt>data/action</tt>: Actions that can be applied to those data structures.
      - <tt>data/field</tt>:  Data types for fields, values and styles. One source file per type.
      - <tt>data/format</tt>: File formats and import/export stuff.
@@ -39,4 +39,4 @@ Additional tools (not needed for building MSE) also depend on:
  - <a href="http://doxygen.org">doxygen</a> for generating the documentation.
  - Perl for small utility scripts
 
-*/
\ No newline at end of file
+*/
diff --git a/tools/website/updates b/tools/website/updates
index dd241cb4..7185d8f3 100644
--- a/tools/website/updates
+++ b/tools/website/updates
@@ -10,4 +10,4 @@ description:
 	<li>Added a "Console" panel for error messages and code evaluation.
 	<li>Fixed several bugs
 	</ul>
-	<a href="http://magicseteditor.sourceforge.net/download">Get version 2.0.0 from the MSE download page</a>.
+	<a href="https://magicseteditor.boards.net/page/downloads">Get version 2.5.8 from the MSE download page</a>.