- Created a new AI SVar "NonStackingEffect" for cards like Blood Moon or Crucible of Worlds.

res/cardsfolder/a/absolute_grace.txt

@@ -2,6 +2,7 @@ Name:Absolute Grace
 ManaCost:1 W
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Creature | AddKeyword$ Protection from black | Description$ All creatures have protection from black.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/absolute_grace.jpg
 Oracle:All creatures have protection from black.

res/cardsfolder/a/absolute_law.txt

@@ -2,6 +2,7 @@ Name:Absolute Law
 ManaCost:1 W
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Creature | AddKeyword$ Protection from red | Description$ All creatures have protection from red.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/absolute_law.jpg
 Oracle:All creatures have protection from red.

res/cardsfolder/a/akromas_memorial.txt

@@ -2,6 +2,7 @@ Name:Akroma's Memorial
 ManaCost:7
 Types:Legendary Artifact
 S:Mode$ Continuous | Affected$ Creature.YouCtrl | AddKeyword$ Flying & First Strike & Vigilance & Trample & Haste & Protection from black & Protection from red | Description$ Creatures you control have flying, first strike, vigilance, trample, haste, and protection from black and from red.
+SVar:NonStackingEffect:True
 SVar:PlayMain1:TRUE
 SVar:Picture:http://www.wizards.com/global/images/magic/general/akromas_memorial.jpg
 Oracle:Creatures you control have flying, first strike, vigilance, trample, haste, and protection from black and from red.

res/cardsfolder/a/aluren.txt

@@ -2,6 +2,7 @@ Name:Aluren
 ManaCost:2 G G
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Creature.cmcLE3 | AddHiddenKeyword$ May be played without paying its mana cost and as though it has flash | AffectedZone$ Hand,Graveyard,Exile | Description$ Any player may play creature cards with converted mana cost 3 or less without paying their mana cost and as though they had flash.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/aluren.jpg
 Oracle:Any player may play creature cards with converted mana cost 3 or less without paying their mana cost and as though they had flash.

res/cardsfolder/a/arcane_laboratory.txt

@@ -5,6 +5,7 @@ S:Mode$ CantBeCast | ValidCard$ Card | Caster$ You | CheckSVar$ X | Description$
 S:Mode$ CantBeCast | ValidCard$ Card | Caster$ Opponent | CheckSVar$ Y
 SVar:X:Count$ThisTurnCast_Card.YouCtrl
 SVar:Y:Count$ThisTurnCast_Card.YouDontCtrl
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/arcane_laboratory.jpg
 Oracle:Each player can't cast more than one spell each turn.

res/cardsfolder/a/arena_of_the_ancients.txt

@@ -5,6 +5,7 @@ Text:Legendary creatures don't untap during their controllers' untap steps.
 K:Permanents don't untap during their controllers' untap steps:Creature.Legendary
 T:Mode$ ChangesZone | Origin$ Any | Destination$ Battlefield | ValidCard$ Card.Self | Execute$ TrigTapAll | TriggerDescription$ When CARDNAME enters the battlefield, tap all legendary creatures.
 SVar:TrigTapAll:AB$TapAll | Cost$ 0 | ValidCards$ Creature.Legendary
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/arena_of_the_ancients.jpg
 Oracle:Legendary creatures don't untap during their controllers' untap steps.\nWhen Arena of the Ancients enters the battlefield, tap all legendary creatures.

res/cardsfolder/a/aysen_highway.txt

@@ -2,6 +2,7 @@ Name:Aysen Highway
 ManaCost:3 W W W
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Creature.White | AddKeyword$ Plainswalk | Description$ White creatures have plainswalk.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/aysen_highway.jpg
 Oracle:White creatures have plainswalk.

res/cardsfolder/b/back_to_basics.txt

@@ -3,6 +3,7 @@ ManaCost:2 U
 Types:Enchantment
 Text:Nonbasic lands don't untap during their controllers' untap steps.
 K:Permanents don't untap during their controllers' untap steps:Land.nonBasic
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/back_to_basics.jpg
 Oracle:Nonbasic lands don't untap during their controllers' untap steps.

res/cardsfolder/b/bedlam.txt

@@ -2,6 +2,7 @@ Name:Bedlam
 ManaCost:2 R R
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Creature | AddHiddenKeyword$ CARDNAME can't block. | Description$ Creatures can't block.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/bedlam.jpg
 Oracle:Creatures can't block.

res/cardsfolder/b/blood_moon.txt

@@ -2,6 +2,7 @@ Name:Blood Moon
 ManaCost:2 R
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Land.nonBasic | AddType$ Mountain | RemoveSubTypes$ True | RemoveAllAbilities$ True | Description$ Nonbasic lands are Mountains.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/blood_moon.jpg
 Oracle:Nonbasic lands are Mountains.

res/cardsfolder/b/bower_passage.txt

@@ -2,6 +2,7 @@ Name:Bower Passage
 ManaCost:1 G
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Creature.YouCtrl | AddHiddenKeyword$ CantBeBlockedBy Creature.withFlying | Description$ Creatures you control can't be blocked by creatures with flying.
+SVar:NonStackingEffect:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/bower_passage.jpg
 Oracle:Creatures with flying can't block creatures you control.
 SetInfo:AVR Uncommon

res/cardsfolder/b/bubble_matrix.txt

@@ -2,6 +2,7 @@ Name:Bubble Matrix
 ManaCost:4
 Types:Artifact
 S:Mode$ PreventDamage | Target$ Creature | Description$ Prevent all damage that would be dealt to creatures.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/bubble_matrix.jpg
 Oracle:Prevent all damage that would be dealt to creatures.

res/cardsfolder/c/caverns_of_despair.txt

@@ -3,6 +3,7 @@ ManaCost:2 R R
 Types:World Enchantment
 K:No more than two creatures can attack each combat.
 K:No more than two creatures can block each combat.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/caverns_of_despair.jpg
 Oracle:No more than two creatures can attack each combat.\nNo more than two creatures can block each combat.

res/cardsfolder/c/chaosphere.txt

@@ -3,6 +3,7 @@ ManaCost:2 R
 Types:World Enchantment
 S:Mode$ Continuous | Affected$ Creature.withFlying | AddHiddenKeyword$ CARDNAME can block only creatures with flying. | Description$ Creatures with flying can block only creatures with flying.
 S:Mode$ Continuous | Affected$ Creature.withoutFlying | AddKeyword$ Reach | Description$ Creatures without flying have reach. (They can block creatures with flying.)
+SVar:NonStackingEffect:True
 SVar:PlayMain1:TRUE
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/chaosphere.jpg

res/cardsfolder/c/choke.txt

@@ -3,6 +3,7 @@ ManaCost:2 G
 Types:Enchantment
 Text:Islands don't untap during their controllers' untap steps.
 K:Permanents don't untap during their controllers' untap steps:Island
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/choke.jpg
 Oracle:Islands don't untap during their controllers' untap steps.

res/cardsfolder/c/city_of_solitude.txt

@@ -5,6 +5,7 @@ S:Mode$ CantBeCast | ValidCard$ Card | Condition$ PlayerTurn | Caster$ Opponent
 S:Mode$ CantBeCast | ValidCard$ Card | Condition$ NotPlayerTurn | Caster$ You
 S:Mode$ CantBeActivated | ValidCard$ Card | Condition$ PlayerTurn | Activator$ Opponent
 S:Mode$ CantBeActivated | ValidCard$ Card | Condition$ NotPlayerTurn | Activator$ You
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://wizards.com/global/images/magic/general/city_of_solitude.jpg
 Oracle:Players can cast spells and activate abilities only during their own turns.

res/cardsfolder/c/concordant_crossroads.txt

@@ -4,6 +4,7 @@ Types:World Enchantment
 S:Mode$ Continuous | Affected$ Creature | AddKeyword$ Haste | Description$ All creatures have haste.
 SVar:BuffedBy:Creature
 SVar:AntiBuffedBy:Creature
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/concordant_crossroads.jpg
 Oracle:All creatures have haste.

res/cardsfolder/c/cornered_market.txt

@@ -3,7 +3,7 @@ ManaCost:2 W
 Types:Enchantment
 S:Mode$ CantPlayLand | ValidCard$ Land.nonBasic+sharesNameWith NonToken | Description$ Players can't play nonbasic lands with the same name as a nontoken permanent.
 S:Mode$ CantBeCast | ValidCard$ Card.sharesNameWith NonToken | Description$ Players can't cast spells with the same name as a nontoken permanent.
-SVar:RemAIDeck:True
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/cornered_market.jpg
 Oracle:Players can't cast spells with the same name as a nontoken permanent.\nPlayers can't play nonbasic lands with the same name as a nontoken permanent.

res/cardsfolder/c/crackdown.txt

@@ -3,6 +3,7 @@ ManaCost:2 W
 Types:Enchantment
 Text:Nonwhite creatures with power 3 or greater don't untap during their controllers' untap steps.
 K:Permanents don't untap during their controllers' untap steps:Creature.powerGE3+nonWhite
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/crackdown.jpg
 Oracle:Nonwhite creatures with power 3 or greater don't untap during their controllers' untap steps.

res/cardsfolder/c/crawlspace.txt

@@ -2,6 +2,7 @@ Name:Crawlspace
 ManaCost:3
 Types:Artifact
 K:No more than two creatures can attack you each combat.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/crawlspace.jpg
 Oracle:No more than two creatures can attack you each combat.

res/cardsfolder/c/crevasse.txt

@@ -2,6 +2,7 @@ Name:Crevasse
 ManaCost:2 R
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Creature.withMountainwalk | AddHiddenKeyword$ May be blocked as though it doesn't have Mountainwalk. | Description$ Creatures with mountainwalk can be blocked as though they didn't have mountainwalk.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/crevasse.jpg
 Oracle:Creatures with mountainwalk can be blocked as though they didn't have mountainwalk.

res/cardsfolder/c/crucible_of_worlds.txt

@@ -2,6 +2,7 @@ Name:Crucible of Worlds
 ManaCost:3
 Types:Artifact
 S:Mode$ Continuous | Affected$ Land.YouOwn | AddHiddenKeyword$ May be played | AffectedZone$ Graveyard | Description$ You may play land cards from your graveyard.
+SVar:NonStackingEffect:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/crucible_of_worlds.jpg
 Oracle:You may play land cards from your graveyard.
 SetInfo:5DN Rare

res/cardsfolder/c/crumbling_sanctuary.txt

@@ -2,6 +2,7 @@ Name:Crumbling Sanctuary
 ManaCost:5
 Types:Artifact
 Text:For each 1 damage that would be dealt to a player, that player exiles the top card of his or her library instead.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/crumbling_sanctuary.jpg
 Oracle:If damage would be dealt to a player, that player exiles that many cards from the top of his or her library instead.

res/cardsfolder/c/curse_of_marit_lage.txt

@@ -5,6 +5,7 @@ Text:Islands don't untap during their controllers' untap steps.
 K:Permanents don't untap during their controllers' untap steps:Island
 T:Mode$ ChangesZone | Origin$ Any | Destination$ Battlefield | ValidCard$ Card.Self | Execute$ TrigTapAll | TriggerDescription$ When CARDNAME enters the battlefield, tap all Islands.
 SVar:TrigTapAll:AB$ TapAll | Cost$ 0 | ValidCards$ Island
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/curse_of_marit_lage.jpg
 Oracle:When Curse of Marit Lage enters the battlefield, tap all Islands.\nIslands don't untap during their controllers' untap steps.

res/cardsfolder/c/cursed_rack.txt

@@ -4,6 +4,7 @@ Types:Artifact
 K:ETBReplacement:Other:ChooseP
 SVar:ChooseP:DB$ ChoosePlayer | Defined$ You | Choices$ Player.Opponent | AILogic$ Curse | SpellDescription$ As CARDNAME enters the battlefield, choose an opponent.
 S:Mode$ Continuous | Affected$ Player.Chosen | SetMaxHandSize$ 4 | Description$ The chosen player's maximum hand size is four.
+SVar:NonStackingEffect:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/cursed_rack.jpg
 Oracle:As Cursed Rack enters the battlefield, choose an opponent.\nThe chosen player's maximum hand size is four.
 SetInfo:ATQ Uncommon

res/cardsfolder/c/cursed_totem.txt

@@ -2,6 +2,7 @@ Name:Cursed Totem
 ManaCost:2
 Types:Artifact
 S:Mode$ Continuous | Affected$ Creature | AddHiddenKeyword$ CARDNAME's activated abilities can't be activated. | Description$ Activated abilities of creatures can't be activated.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/cursed_totem.jpg
 Oracle:Activated abilities of creatures can't be activated.

res/cardsfolder/d/damping_field.txt

@@ -2,6 +2,7 @@ Name:Damping Field
 ManaCost:2 W
 Types:Enchantment
 Text:Players can't untap more than one artifact during their untap steps.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/damping_field.jpg
 Oracle:Players can't untap more than one artifact during their untap steps.

res/cardsfolder/d/damping_matrix.txt

@@ -2,6 +2,7 @@ Name:Damping Matrix
 ManaCost:3
 Types:Artifact
 S:Mode$ CantBeActivated | ValidCard$ Artifact,Creature | NonMana$ True | Description$ Activated abilities of artifacts and creatures can't be activated unless they're mana abilities.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/damping_matrix.jpg
 Oracle:Activated abilities of artifacts and creatures can't be activated unless they're mana abilities.

res/cardsfolder/d/darkest_hour.txt

@@ -2,6 +2,7 @@ Name:Darkest Hour
 ManaCost:B
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Creature | SetColor$ Black | Description$ All creatures are black.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/darkest_hour.jpg
 Oracle:All creatures are black.

res/cardsfolder/d/darksteel_forge.txt

@@ -2,6 +2,7 @@ Name:Darksteel Forge
 ManaCost:9
 Types:Artifact
 S:Mode$ Continuous | Affected$ Artifact.YouCtrl | AddHiddenKeyword$ Indestructible | Description$ Artifacts you control are indestructible.
+SVar:NonStackingEffect:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/darksteel_forge.jpg
 Oracle:Artifacts you control are indestructible. ("Destroy" effects and lethal damage don't destroy them.)
 SetInfo:DST Rare

res/cardsfolder/d/deadfall.txt

@@ -2,6 +2,7 @@ Name:Deadfall
 ManaCost:2 G
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Creature.withForestwalk | AddHiddenKeyword$ May be blocked as though it doesn't have Forestwalk. | Description$ Creatures with forestwalk can be blocked as though they didn't have forestwalk.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/deadfall.jpg
 Oracle:Creatures with forestwalk can be blocked as though they didn't have forestwalk.

res/cardsfolder/d/dense_canopy.txt

@@ -2,6 +2,7 @@ Name:Dense Canopy
 ManaCost:1 G
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Creature.withFlying | AddHiddenKeyword$ CARDNAME can block only creatures with flying. | Description$ Creatures with flying can block only creatures with flying.
+SVar:NonStackingEffect:True
 SVar:PlayMain1:TRUE
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/dense_canopy.jpg

res/cardsfolder/d/dense_foliage.txt

@@ -2,6 +2,7 @@ Name:Dense Foliage
 ManaCost:2 G
 Types:Enchantment
 S:Mode$ CantTarget | ValidCard$ Creature | Spell$ True | Description$ Creatures can't be the target of spells.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/dense_foliage.jpg
 Oracle:Creatures can't be the targets of spells.

res/cardsfolder/d/divine_presence.txt

@@ -5,6 +5,7 @@ R:Event$ DamageDone | ActiveZones$ Battlefield | ValidTarget$ Creature,Player |
 R:Event$ DamageDone | ActiveZones$ Battlefield | ValidTarget$ Creature,Player | DamageAmount$ GE4 | IsCombat$ True | ReplaceWith$ Dmg3Combat | Secondary$ True | Description$ If a source would deal 4 or more damage to a creature or player, that source deals 3 damage to that creature or player instead.
 SVar:Dmg3:AB$DealDamage | Cost$ 0 | Defined$ ReplacedTarget | DamageSource$ ReplacedSource | NumDmg$ 3
 SVar:Dmg3Combat:AB$DealDamage | Cost$ 0 | Defined$ ReplacedTarget | DamageSource$ ReplacedSource | CombatDamage$ True | NumDmg$ 3
+SVar:NonStackingEffect:True
 SVar:PlayMain1:TRUE
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/divine_presence.jpg

res/cardsfolder/d/dolmen_gate.txt

@@ -2,6 +2,7 @@ Name:Dolmen Gate
 ManaCost:2
 Types:Artifact
 S:Mode$ PreventDamage | Target$ Creature.attacking+YouCtrl | CombatDamage$ True | Description$ Prevent all combat damage that would be dealt to attacking creatures you control.
+SVar:NonStackingEffect:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/dolmen_gate.jpg
 Oracle:Prevent all combat damage that would be dealt to attacking creatures you control.
 SetInfo:LRW Rare

res/cardsfolder/d/dream_halls.txt

@@ -2,6 +2,7 @@ Name:Dream Halls
 ManaCost:3 U U
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Card.YouCtrl | AddHiddenKeyword$ Alternative Cost Discard<1/Card.SharesColorWith/color sharing> | AffectedZone$ Hand,Graveyard,Exile,Library | Description$ Rather than pay the mana cost for a spell, its controller may discard a card that shares a color with that spell.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/dream_halls.jpg
 Oracle:Rather than pay the mana cost for a spell, its controller may discard a card that shares a color with that spell.

res/cardsfolder/d/dueling_grounds.txt

@@ -3,6 +3,7 @@ ManaCost:1 G W
 Types:Enchantment
 S:Mode$ Continuous | GlobalRule$ No more than one creature can attack each turn. | Description$ No more than one creature can attack each turn.
 S:Mode$ Continuous | GlobalRule$ No more than one creature can block each combat. | Description$ No more than one creature can block each turn.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/dueling_grounds.jpg
 Oracle:No more than one creature can attack each turn.\nNo more than one creature can block each turn.

res/cardsfolder/e/earnest_fellowship.txt

@@ -7,6 +7,7 @@ S:Mode$ Continuous | Affected$ Creature.Blue | AddKeyword$ Protection from blue
 S:Mode$ Continuous | Affected$ Creature.Black | AddKeyword$ Protection from black
 S:Mode$ Continuous | Affected$ Creature.Red | AddKeyword$ Protection from red
 S:Mode$ Continuous | Affected$ Creature.Green | AddKeyword$ Protection from green
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/earnest_fellowship.jpg
 Oracle:Each creature has protection from its colors.

res/cardsfolder/e/enchanted_evening.txt

@@ -2,6 +2,7 @@ Name:Enchanted Evening
 ManaCost:3 WU WU
 Types:Enchantment
 S:Mode$ Continuous | Affected$ Permanent | AddType$ Enchantment | Description$ All permanents are enchantments in addition to their other types.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/enchanted_evening.jpg
 Oracle:All permanents are enchantments in addition to their other types.

res/cardsfolder/e/energy_field.txt

@@ -4,6 +4,7 @@ Types:Enchantment
 T:Mode$ ChangesZone | Origin$ Any | Destination$ Graveyard | ValidCard$ Card.nonToken+YouOwn | Execute$ TrigSac | TriggerZones$ Battlefield | TriggerDescription$ When a card is put into your graveyard from anywhere, sacrifice CARDNAME.
 SVar:TrigSac:AB$ Sacrifice | Cost$ 0 | Defined$ Self
 S:Mode$ PreventDamage | Target$ You | Source$ Card.YouDontCtrl | Description$ Prevent all damage that would be dealt to you by sources you don't control.
+SVar:NonStackingEffect:True
 SVar:RemAIDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/energy_field.jpg
 Oracle:Prevent all damage that would be dealt to you by sources you don't control.\nWhen a card is put into your graveyard from anywhere, sacrifice Energy Field.

res/cardsfolder/e/ensnaring_bridge.txt

@@ -3,6 +3,7 @@ ManaCost:3
 Types:Artifact
 S:Mode$ Continuous | Affected$ Creature.powerGTX | AddHiddenKeyword$ CARDNAME can't attack. | Description$ Creatures with power greater than the number of cards in your hand can't attack.
 SVar:X:Count$InYourHand
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/ensnaring_bridge.jpg
 Oracle:Creatures with power greater than the number of cards in your hand can't attack.

res/cardsfolder/e/eon_hub.txt

@@ -2,6 +2,7 @@ Name:Eon Hub
 ManaCost:5
 Types:Artifact
 S:Mode$ Continuous | Affected$ Player | AddKeyword$ Skip your upkeep step. | Description$ Players skip their upkeep steps.
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/eon_hub.jpg
 Oracle:Players skip their upkeep steps.

res/cardsfolder/e/everlasting_torment.txt

@@ -4,6 +4,7 @@ Types:Enchantment
 S:Mode$ Continuous | Affected$ Player | AddKeyword$ You can't gain life. | Description$ Players can't gain life.
 S:Mode$ Continuous | GlobalRule$ Damage can't be prevented. | Description$ Damage can't be prevented.
 S:Mode$ Continuous | GlobalRule$ All damage is dealt as though it's source had wither. | Description$ All damage is dealt as though it's source had wither. (A source with wither deals damage to creatures in the form of -1/-1 counters.)
+SVar:NonStackingEffect:True
 SVar:RemRandomDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/everlasting_torment.jpg
 Oracle:Players can't gain life.\nDamage can't be prevented.\nAll damage is dealt as though its source had wither. (A source with wither deals damage to creatures in the form of -1/-1 counters.)

res/cardsfolder/t/trinisphere.txt

@@ -4,6 +4,7 @@ Types:Artifact
 S:Mode$ SetCost | ValidCard$ Card | Type$ Spell | Amount$ Min3 | CheckSVar$ X | SVarCompare$ EQ1 | Description$ As long as CARDNAME is untapped, each spell that would cost less than three mana to cast costs three mana to cast. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost 1 B to cast costs 2 B to cast instead.)
 SVar:X:Count$Valid Card.Self+untapped
 SVar:RemRandomDeck:True
+SVar:NonStackingEffect:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/trinisphere.jpg
 Oracle:As long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost {1}{B} to cast costs {2}{B} to cast instead.)
 SetInfo:DST Rare

src/main/java/forge/game/ai/AiController.java

@@ -502,12 +502,17 @@ public class AiController {
         
         private int getSpellAbilityPriority(SpellAbility sa) {
             int p = 0;
+            Card source = sa.getSourceCard();
             // puts creatures in front of spells
-            if (sa.getSourceCard().isCreature()) {
+            if (source.isCreature()) {
                 p += 1;
             }
             // don't play equipments before having any creatures
-            if (sa.getSourceCard().isEquipment() && sa.getSourceCard().getController().getCreaturesInPlay().isEmpty()) {
+            if (source.isEquipment() && sa.getSourceCard().getController().getCreaturesInPlay().isEmpty()) {
+                p -= 9;
+            }
+            // artifacts and enchantments with effects that do not stack
+            if ("True".equals(source.getSVar("NonStackingEffect")) && source.getController().isCardInPlay(source.getName())) {
                 p -= 9;
             }
             // sort planeswalker abilities for ultimate