Name:Bitter Feud
ManaCost:4 R
Types:Enchantment
K:ETBReplacement:Other:ChooseP
SVar:ChooseP:DB$ ChoosePlayer | Defined$ You | Choices$ Player | AILogic$ Curse | RememberChosen$ True | SubAbility$ ChoosePTwo | SpellDescription$ As CARDNAME enters the battlefield, choose two players.
SVar:ChoosePTwo:DB$ ChoosePlayer | Defined$ You | Choices$ NonChosenPlayer | AILogic$ Curse

R:Event$ DamageDone | ActiveZones$ Battlefield | ValidSource$ Card.RememberedPlayerCtrl | ValidTarget$ Permanent.ChosenCtrl,Player.Chosen | ReplaceWith$ DmgTwice | Description$ If a source controlled by one of the chosen players would deal damage to the other chosen player or a permanent that player controls, that source deals double that damage to that player or permanent instead.

R:Event$ DamageDone | ActiveZones$ Battlefield | ValidSource$ Card.ChosenCtrl | ValidTarget$ Permanent.RememberedPlayerCtrl,Player.Remembered | ReplaceWith$ DmgTwice | Secondary$ True | Description$ If a source controlled by one of the chosen players would deal damage to the other chosen player or a permanent that player controls, that source deals double that damage to that player or permanent instead.

SVar:DmgTwice:DB$ ReplaceEffect | VarName$ DamageAmount | VarValue$ X | References$ X
SVar:X:ReplaceCount$DamageAmount/Twice

T:Mode$ ChangesZone | Origin$ Battlefield | Destination$ Any | ValidCard$ Card.Self | Execute$ DBCleanup | Static$ True

SVar:DBCleanup:DB$ Cleanup | ClearRemembered$ True

SVar:Picture:http://www.wizards.com/global/images/magic/general/bitter_feud.jpg
Oracle:As Bitter Feud enters the battlefield, choose two players.\nIf a source controlled by one of the chosen players would deal damage to the other chosen player or a permanent that player controls, that source deals double that damage to that player or permanent instead.