diff --git a/.gitattributes b/.gitattributes
index b73af860f7e..1cd7cfb4089 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -4992,6 +4992,7 @@ forge-gui/res/cardsfolder/g/galvanic_juggernaut.txt -text
 forge-gui/res/cardsfolder/g/galvanic_key.txt svneol=native#text/plain
 forge-gui/res/cardsfolder/g/galvanoth.txt -text
 forge-gui/res/cardsfolder/g/gamble.txt svneol=native#text/plain
+forge-gui/res/cardsfolder/g/game_of_chaos.txt -text
 forge-gui/res/cardsfolder/g/game_preserve.txt -text
 forge-gui/res/cardsfolder/g/game_trail_changeling.txt svneol=native#text/plain
 forge-gui/res/cardsfolder/g/gamekeeper.txt -text
diff --git a/forge-game/src/main/java/forge/game/ability/effects/RepeatEffect.java b/forge-game/src/main/java/forge/game/ability/effects/RepeatEffect.java
index 6a015513670..4d85cf65114 100644
--- a/forge-game/src/main/java/forge/game/ability/effects/RepeatEffect.java
+++ b/forge-game/src/main/java/forge/game/ability/effects/RepeatEffect.java
@@ -123,7 +123,10 @@ public class RepeatEffect extends SpellAbilityEffect {
         }
 
         if (sa.hasParam("RepeatOptional")) {
-            return sa.getActivatingPlayer().getController().confirmAction(sa, null, "Do you want to repeat this process again?");
+            Player decider = sa.hasParam("RepeatOptionalDecider")
+                    ? AbilityUtils.getDefinedPlayers(sa.getHostCard(), sa.getParam("RepeatOptionalDecider"), sa).get(0)
+                    : sa.getActivatingPlayer();
+            return decider.getController().confirmAction(sa, null, "Do you want to repeat this process again?");
         }
 
         return true;
diff --git a/forge-gui/res/cardsfolder/g/game_of_chaos.txt b/forge-gui/res/cardsfolder/g/game_of_chaos.txt
new file mode 100644
index 00000000000..2c79cf77427
--- /dev/null
+++ b/forge-gui/res/cardsfolder/g/game_of_chaos.txt
@@ -0,0 +1,18 @@
+Name:Game of Chaos
+ManaCost:R R R
+Types:Sorcery
+A:SP$ Repeat | Cost$ R R R | ValidTgts$ Opponent | IsCurse$ True | StackDescription$ SpellDescription | RepeatOptional$ True | RepeatSubAbility$ DBCleanup | RepeatOptionalDecider$ Remembered | SubAbility$ DBRestore | SpellDescription$ Flip a coin. If you win the flip, you gain 1 life and target opponent loses 1 life, and you decide whether to flip again. If you lose the flip, you lose 1 life and that opponent gains 1 life, and that player decides whether to flip again. Double the life stakes with each flip.
+SVar:DBCleanup:DB$ Cleanup | ClearRemembered$ True | SubAbility$ DBFlip
+SVar:DBFlip:DB$ FlipACoin | Caller$ You | WinSubAbility$ GainlifeYou | LoseSubAbility$ GainlifeOpp | SubAbility$ DoubleLifeStake
+SVar:GainlifeYou:DB$ GainLife | Defined$ You | LifeAmount$ NumLife | SubAbility$ LoseLifeOpp
+SVar:LoseLifeOpp:DB$ LoseLife | Defined$ Targeted | LifeAmount$ NumLife | SubAbility$ RememberYou
+SVar:RememberYou:DB$ Pump | RememberObjects$ You
+SVar:GainlifeOpp:DB$ GainLife | Defined$ Targeted | LifeAmount$ NumLife | SubAbility$ LoseLifeYou
+SVar:LoseLifeYou:DB$ LoseLife | Defined$ You | LifeAmount$ NumLife | SubAbility$ RememberOpp
+SVar:RememberOpp:DB$ Pump | RememberObjects$ Targeted
+SVar:DoubleLifeStake:DB$ StoreSVar | SVar$ NumLife | References$ NumLife | Type$ CountSVar | Expression$ NumLife/Times.2
+SVar:DBRestore:DB$ StoreSVar | SVar$ NumLife | References$ NumLife | Type$ Number | Expression$ 1
+SVar:NumLife:Number$1
+SVar:RemAIDeck:True
+SVar:Picture:http://www.wizards.com/global/images/magic/general/game_of_chaos.jpg
+Oracle:Flip a coin. If you win the flip, you gain 1 life and target opponent loses 1 life, and you decide whether to flip again. If you lose the flip, you lose 1 life and that opponent gains 1 life, and that player decides whether to flip again. Double the life stakes with each flip.