Cirfe launches an attack at Zaius (4 base damage x 2 = 8 damage) Mass Frenzy added 3 damage. (8 + 3 = 11 damage) Zaius was ready for that! War Monkeys drew a card. Monkey Mail reduced damage to Zaius by 2. (11 - 2 = 9 damage) Zaius took 5 Slashing damage. (5 != 9) BATTLE LOG: Scenario=Monkey Path,Room=AWMO (tempo),RoomID=1282160,Msg=The active player is now tempo BATTLE LOG: Player=tempo,Scenario=Monkey Path,Room=AWMO (tempo),RoomID=1282160,Event=PlayAction,Action=All Out Attack,Instigator=Cirfe,Targets=Zaius BATTLE LOG: Player=tempo,Scenario=Monkey Path,Room=AWMO (tempo),RoomID=1282160,Event=TriggerSucceed,Trigger=Mass Frenzy,TriggeringActor=Cirfe,AffectedActors=,TriggerType=Action,TriggerLocation=ActorAttachment BATTLE LOG: Player=tempo,Scenario=Monkey Path,Room=AWMO (tempo),RoomID=1282160,Event=TriggerSucceed,Trigger=Simian Reflexes,TriggeringActor=Zaius,AffectedActors=,TriggerType=Action,TriggerLocation=Hand BATTLE LOG: Scenario=Monkey Path,Room=AWMO (tempo),RoomID=1282160,Msg=Gary drew a card for War Monkeys BATTLE LOG: Player=tempo,Scenario=Monkey Path,Room=AWMO (tempo),RoomID=1282160,Event=TriggerSucceed,Trigger=Monkey Mail,TriggeringActor=Zaius,AffectedActors=,TriggerType=PreDamage,TriggerLocation=Hand BATTLE LOG: Scenario=Monkey Path,Room=AWMO (tempo),RoomID=1282160,Msg=Zaius took 5 damage
It's because the card is split in half, if you use the top half, the bottom half cannot be used, if it procced on itself, then it would technically 2 cards. So when you pull out and use the damage portion, obviously you wouldn't have the "double damage" portion in your hand any longer.