diff --git a/data/magic.mse-game/packs b/data/magic.mse-game/packs
index 526f3b1a..2ef2dca2 100644
--- a/data/magic.mse-game/packs
+++ b/data/magic.mse-game/packs
@@ -1,73 +1,187 @@
 
 ############################################################## Card pack items
 
+pack item:
+	name: basic land
+	select: cyclic
+	filter: card.rarity == "basic land" and not is_token_card() # can be shifted
 pack item:
 	name: common
-	filter: card.rarity == "common" and card.shape != "token" and card.shape != "rulestip"
+	filter: card.rarity == "common" and not is_token_card() and not is_shifted_card()
 pack item:
 	name: uncommon
-	filter: card.rarity == "uncommon" and card.shape != "token" and card.shape != "rulestip"
+	filter: card.rarity == "uncommon" and not is_token_card() and not is_shifted_card()
 pack item:
 	name: rare
-	filter: contains(card.rarity, match: "rare") and card.shape != "token" and card.shape != "rulestip"
+	filter: card.rarity == "rare" and not is_token_card() and not is_shifted_card()
+pack item:
+	name: mythic rare
+	filter: card.rarity == "mythic rare" and not is_token_card() and not is_shifted_card()
 pack item:
 	name: special
-	filter: card.rarity == "special" and card.shape != "token" and card.shape != "rulestip"
+	filter: card.rarity == "special" and not is_token_card() # can be shifted
+
 pack item:
-	name: basic land
-	filter: card.rarity == "basic land" and card.shape != "token" and card.shape != "rulestip"
+	name: shifted common
+	filter: card.rarity == "common" and not is_token_card() and is_shifted_card()
+pack item:
+	name: shifted uncommon
+	filter: card.rarity == "uncommon" and not is_token_card() and is_shifted_card()
+pack item:
+	name: shifted rare
+	filter:
+		( card.rarity == "rare" or
+		  card.rarity == "mythic rare" # We've got to put shifted mythic rares somewhere
+		) and not is_token_card() and is_shifted_card()
+
 pack item:
 	name: token / rulestip
-	filter: card.shape == "token" or card.shape == "rulestip"
+	filter: is_token_card()
+
+############################################################## shifted/special if possible
+
+# shifted common if they exist, otherwise a normal common
+pack item:
+	name: shifted common or else common
+	selectable: false
+	select: first
+	item: shifted common
+	item: common
+
+# basic land if it exist, otherwise a common
+pack item:
+	name: basic land or else common
+	selectable: false
+	select: first
+	item: basic land
+	item: common
+
+# special if it exist, otherwise a common
+pack item:
+	name: special or else common
+	selectable: false
+	select: first
+	item: special
+	item: common
+
+# shifted uncommon/rare if they exist, otherwise a normal uncommon
+pack item:
+	name: shifted uncommon or rare or else uncommon
+	selectable: false
+	select: first
+	item: shifted uncommon or rare
+	item: uncommon
+
+############################################################## Randomized selections
+
+pack item:
+	name: mythic rare or rare
+	selectable: false
+	# In Shards of Alara there are 15 mythic rares and 53 rares.
+	# Each booster has a 1/8 chance of containing a mythic rare.
+	# This means that looking at single mythics : rares, the proportion is
+	#  1*53 : 7*15 = 53 : 105
+	# this is almost exactly 1 : 2,
+	# So, a a single mythic is 2 times as rare as a single normal rare.
+	# 
+	# We use this proportional system instead of a fixed 1:7 system,
+	#  because it copes better with cases where there are few mythics.
+	# For example, if a set has 1 mythic and 20 rares, you would actually
+	# be MORE likely to find the mythic card with the 1:7 system!
+	select: proportional
+	item:
+		name: mythic rare
+		probability: 1
+	item:
+		name: rare
+		probability: 2
+
+pack item:
+	name: shifted uncommon or rare
+	selectable: false
+	select: nonempty
+	item:
+		name: shifted uncommon
+		probability: 3
+	item:
+		name: shifted rare
+		probability: 1
+
+############################################################## Common proportions of cards
+
+# of the common slots, 3/10 will be shifted, 1/10 will be special
+pack item:
+	name: common sometimes shifted or special
+	selectable: false
+	# TODO: Perhaps use some kind of proportional system here as well?
+	select: cyclic
+	item: common
+	item: common
+	item: shifted common or else common
+	item: common
+	item: common
+	item: shifted common or else common
+	item: common
+	item: common
+	item: shifted common or else common
+	item: special or else common
+
+# of the uncommon slots, 1/3 will be shifted, 1/4 of that will be shifted rares instead
+pack item:
+	name: uncommon sometimes shifted
+	selectable: false
+	select: cyclic
+	item: uncommon
+	item: uncommon
+	item: shifted uncommon or rare or else uncommon
+
 ############################################################## Card packs
 
 pack type:
 	name: tournament pack
 	item:
-		name: rare
+		name: mythic rare or rare
 		amount: 3
 	item:
-		name: uncommon
+		name: uncommon sometimes shifted
 		amount: 9
 	item:
-		name: common
+		name: common sometimes shifted or special
 		amount: 33
 	item:
 		name: basic land
 		amount: 30
-		type: cyclic
 	item:
 		name: token / rulestip
 pack type:
 	name: booster pack
 	item:
-		name: rare
+		name: mythic rare or rare
 		amount: 1
 	item:
-		name: uncommon
+		name: uncommon sometimes shifted
 		amount: 3
+	# a total of 11 common-likes
 	item:
-		name: common
-		amount: 11
+		name: common sometimes shifted or special
+		amount: 10
+	item:
+		name: basic land or else common
 	item:
 		name: token / rulestip
+
+pack type:
+	name: additional land
+	item: basic land
 pack type:
 	name: additional common
-	item:
-		name: common
+	item: common sometimes shifted or special
 pack type:
 	name: additional uncommon
-	item:
-		name: uncommon
+	item: uncommon sometimes shifted
 pack type:
 	name: additional rare
-	item:
-		name: rare
-pack type:
-	name: additional special
-	item:
-		name: special
+	item: mythic rare or rare
 pack type:
 	name: additional token / rulestip
-	item:
-		name: token / rulestip
\ No newline at end of file
+	item: token / rulestip
diff --git a/data/magic.mse-game/script b/data/magic.mse-game/script
index 5d3009be..fd302600 100644
--- a/data/magic.mse-game/script
+++ b/data/magic.mse-game/script
@@ -288,6 +288,10 @@ card_count := {
 	number_of_items(in: set, filter: set_filter())
 }
 
+# used by pack scripts
+is_token_card   := { card.shape == "token" or card.shape == "rulestip" }
+is_shifted_card := { contains(card.shape, match:"shifted") }
+
 
 ############################################################## Utilities for keywords