diff --git a/data/magic-extended-art.mse-style/style b/data/magic-extended-art.mse-style/style
index 9318beb9..ef964287 100644
--- a/data/magic-extended-art.mse-style/style
+++ b/data/magic-extended-art.mse-style/style
@@ -264,6 +264,7 @@ extra card field:
 	type: choice
 	name: pt box
 	script: card.card_color
+	editable: false
 
 extra card style:
 	pt box:
diff --git a/data/magic-firepenguinmaster-flip.mse-style/style b/data/magic-firepenguinmaster-flip.mse-style/style
index 44f079a2..2eeb01fa 100644
--- a/data/magic-firepenguinmaster-flip.mse-style/style
+++ b/data/magic-firepenguinmaster-flip.mse-style/style
@@ -401,10 +401,12 @@ extra card field:
 	type: choice
 	name: pt symbols
 	script: "shieldsword"
+	editable: false
 extra card field:
 	type: choice
 	name: pt symbols 2
 	script: "shieldsword"
+	editable: false
 
 extra card style:
 	pt symbols:
diff --git a/data/magic-firepenguinmaster.mse-style/style b/data/magic-firepenguinmaster.mse-style/style
index 77a0d449..92f16ffd 100644
--- a/data/magic-firepenguinmaster.mse-style/style
+++ b/data/magic-firepenguinmaster.mse-style/style
@@ -308,6 +308,7 @@ extra card field:
 	type: choice
 	name: pt symbols
 	script: "shieldsword"
+	editable: false
 
 extra card style:
 	pt symbols:
diff --git a/data/magic-firepenguinmasterpromo.mse-style/style b/data/magic-firepenguinmasterpromo.mse-style/style
index e382e728..5f9c99ea 100644
--- a/data/magic-firepenguinmasterpromo.mse-style/style
+++ b/data/magic-firepenguinmasterpromo.mse-style/style
@@ -312,6 +312,7 @@ extra card field:
 	type: choice
 	name: pt symbols
 	script: "shieldsword"
+	editable: false
 
 extra card style:
 	pt symbols:
diff --git a/data/magic-firepenguinmastersplit.mse-style/style b/data/magic-firepenguinmastersplit.mse-style/style
index f87a1420..de6edf9e 100644
--- a/data/magic-firepenguinmastersplit.mse-style/style
+++ b/data/magic-firepenguinmastersplit.mse-style/style
@@ -471,10 +471,12 @@ extra card field:
 	type: choice
 	name: pt symbols
 	script: "shieldsword"
+	editable: false
 extra card field:
 	type: choice
 	name: pt symbols 2
 	script: "shieldsword"
+	editable: false
 
 extra card style:
 	pt symbols:
diff --git a/data/magic-firepenguinmastertokens.mse-style/style b/data/magic-firepenguinmastertokens.mse-style/style
index 67af1f54..ebccf966 100644
--- a/data/magic-firepenguinmastertokens.mse-style/style
+++ b/data/magic-firepenguinmastertokens.mse-style/style
@@ -337,6 +337,7 @@ extra card field:
 	type: choice
 	name: pt symbols
 	script: "shieldsword"
+	editable: false
 
 extra card style:
 	pt symbols:
diff --git a/data/magic-new-flip.mse-style/style b/data/magic-new-flip.mse-style/style
index 5c55dc44..80e7685d 100644
--- a/data/magic-new-flip.mse-style/style
+++ b/data/magic-new-flip.mse-style/style
@@ -366,11 +366,12 @@ extra card field:
 	type: choice
 	name: pt box
 	script: card.card_color
-
+	editable: false
 extra card field:
 	type: choice
 	name: pt box 2
 	script: card.card_color
+	editable: false
 
 extra card style:
 	pt box:
diff --git a/data/magic-new-promo.mse-style/style b/data/magic-new-promo.mse-style/style
index 6e8fc77a..fb8cd91f 100644
--- a/data/magic-new-promo.mse-style/style
+++ b/data/magic-new-promo.mse-style/style
@@ -269,6 +269,7 @@ extra card field:
 	type: choice
 	name: pt box
 	script: card.card_color
+	editable: false
 
 extra card style:
 	pt box:
diff --git a/data/magic-new-split.mse-style/style b/data/magic-new-split.mse-style/style
index dd29b9d8..48f221fc 100644
--- a/data/magic-new-split.mse-style/style
+++ b/data/magic-new-split.mse-style/style
@@ -410,11 +410,12 @@ extra card field:
 	type: choice
 	name: pt box
 	script: card.card_color
-
+	editable: false
 extra card field:
 	type: choice
 	name: pt box 2
 	script: card.card_color_2
+	editable: false
 
 extra card style:
 	pt box:
diff --git a/data/magic-new.mse-style/style b/data/magic-new.mse-style/style
index 7e72b6f7..ca776706 100644
--- a/data/magic-new.mse-style/style
+++ b/data/magic-new.mse-style/style
@@ -312,6 +312,7 @@ extra card field:
 	type: choice
 	name: pt box
 	script: card.card_color
+	editable: false
 
 extra card style:
 	pt box:
diff --git a/data/magic-planeshifted.mse-style/style b/data/magic-planeshifted.mse-style/style
index 00b1b9ce..ff7d7ebc 100644
--- a/data/magic-planeshifted.mse-style/style
+++ b/data/magic-planeshifted.mse-style/style
@@ -277,6 +277,7 @@ extra card field:
 	type: choice
 	name: pt box
 	script: card.card_color
+	editable: false
 
 extra card style:
 	pt box:
diff --git a/src/data/card.cpp b/src/data/card.cpp
index c9882286..26aebb9d 100644
--- a/src/data/card.cpp
+++ b/src/data/card.cpp
@@ -12,6 +12,7 @@
 #include <data/field.hpp>
 #include <util/error.hpp>
 #include <util/reflect.hpp>
+#include <wx/sstream.h>
 
 DECLARE_TYPEOF_COLLECTION(FieldP);
 DECLARE_TYPEOF_NO_REV(IndexMap<FieldP COMMA ValueP>);
@@ -51,6 +52,48 @@ void mark_dependency_member(const Card& card, const String& name, const Dependen
 IMPLEMENT_REFLECTION(Card) {
 	REFLECT(stylesheet);
 	REFLECT(notes);
+	REFLECT_NO_SCRIPT(extra_data);
 	REFLECT_NAMELESS(data);
 }
 
+// ----------------------------------------------------------------------------- : Styling
+
+// TODO : this is practically the same as Set::Styling, maybe somehow abstract it
+
+// Extra card data, for a specific stylesheet
+/* The data is not read immediatly, because we do not know the stylesheet */
+class Card::Styling : public IntrusivePtrBase<Card::Styling> {
+  public:
+	/// The values on the extra card fields of the card.
+	/** The indices should correspond to the extra_card_fields in the StyleSheet */
+	IndexMap<FieldP, ValueP> extra_data;
+	/// Unparsed extra_data
+	String unread_data;
+	DECLARE_REFLECTION();
+};
+
+IndexMap<FieldP, ValueP>& Card::extraDataFor(const StyleSheet& stylesheet) {
+	StylingP& styling = extra_data[stylesheet.name()];
+	if (!styling) {
+		styling = new_intrusive<Styling>();
+		styling->extra_data.init(stylesheet.extra_card_fields);
+	} else if (!styling->unread_data.empty() || (styling->extra_data.empty()) && !stylesheet.extra_card_fields.empty()) {
+		// we delayed the reading of the data, read it now
+		styling->extra_data.init(stylesheet.extra_card_fields);
+		Reader reader(new_shared1<wxStringInputStream>(styling->unread_data), _("extra card values for ") + stylesheet.stylesheetName());
+		reader.handle_greedy(styling->extra_data);
+		styling->unread_data.clear();
+	}
+	return styling->extra_data;
+}
+
+// custom reflection : read into unread_data
+template <> void Reader::handle(Card::Styling& s) {
+	handle(s.unread_data);
+}
+template <> void Writer::handle(const Card::Styling& s) {
+	handle(s.extra_data);
+}
+// for the love of god, don't depend on styling
+template <> void GetMember::handle(const Card::Styling& s) {}
+template <> void GetDefaultMember::handle(const Card::Styling& s) {}
diff --git a/src/data/card.hpp b/src/data/card.hpp
index fe50bf34..bb1bc305 100644
--- a/src/data/card.hpp
+++ b/src/data/card.hpp
@@ -34,15 +34,18 @@ class Card : public IntrusivePtrVirtualBase {
 	/// The values on the fields of the card.
 	/** The indices should correspond to the card_fields in the Game */
 	IndexMap<FieldP, ValueP> data;
-	/// The values on the extra fields of the card.
-	/** The indices should correspond to the extra_card_fields in the StyleSheet */
-	IndexMap<FieldP, ValueP> extra_data;
 	/// Notes for this card
 	String notes;
 	/// Alternative style to use for this card
 	/** Optional; if not set use the card style from the set */
 	StyleSheetP stylesheet;
 	
+	/// Extra values for specitic stylesheets, indexed by stylesheet name
+	DECLARE_POINTER_TYPE(Styling);
+	map<String, StylingP> extra_data;
+	/// Styling information for a particular stylesheet
+	IndexMap<FieldP, ValueP>& extraDataFor(const StyleSheet& stylesheet) ;
+	
 	/// Get the identification of this card, an identification is something like a name, title, etc.
 	/** May return "" */
 	String identification() const;
diff --git a/src/data/stylesheet.cpp b/src/data/stylesheet.cpp
index 3dbd78f4..cc067c29 100644
--- a/src/data/stylesheet.cpp
+++ b/src/data/stylesheet.cpp
@@ -85,9 +85,9 @@ IMPLEMENT_REFLECTION(StyleSheet) {
 	REFLECT(extra_card_fields);
 	REFLECT_IF_READING {
 		if (extra_card_style.init(extra_card_fields)) {
-			// make sure the extra_card_fields are not editable and savable
+			// if a value is not editable, don't save it
 			FOR_EACH(f, extra_card_fields) {
-				f->editable = f->save_value = false;
+				if (!f->editable) f->save_value = false;
 			}
 		}
 	}
diff --git a/src/render/card/viewer.cpp b/src/render/card/viewer.cpp
index fbc50412..88e44d9e 100644
--- a/src/render/card/viewer.cpp
+++ b/src/render/card/viewer.cpp
@@ -96,8 +96,7 @@ void DataViewer::setCard(const CardP& card, bool refresh) {
 	this->card = card;
 	stylesheet = new_stylesheet;
 	setStyles(stylesheet, stylesheet->card_style, &stylesheet->extra_card_style);
-	card->extra_data.init(stylesheet->extra_card_fields); // make sure extra_data is initialized
-	setData(card->data, &card->extra_data);
+	setData(card->data, &card->extraDataFor(*stylesheet));
 	onChangeSize();
 }
 
diff --git a/src/script/script_manager.cpp b/src/script/script_manager.cpp
index 1d802b62..f7d20e5b 100644
--- a/src/script/script_manager.cpp
+++ b/src/script/script_manager.cpp
@@ -196,8 +196,8 @@ void SetScriptManager::updateStyles(const CardP& card) {
 	const StyleSheet& stylesheet = set.stylesheetFor(card);
 	Context& ctx = getContext(card);
 	// update extra card fields
-	card->extra_data.init(stylesheet.extra_card_fields);
-	FOR_EACH(v, card->extra_data) {
+	IndexMap<FieldP,ValueP>& extra_data = card->extraDataFor(stylesheet);
+	FOR_EACH(v, extra_data) {
 		v->update(ctx);
 	}
 	// update all styles