Name:Knowledge Vault
ManaCost:4
Types:Artifact
A:AB$ ChangeZone | Cost$ 2 T | Defined$ TopOfLibrary | Origin$ Library | Destination$ Exile | ExileFaceDown$ True | RememberChanged$ True | SpellDescription$ Exile the top card of your library face down.
A:AB$ SacrificeAll | Cost$ 0 | ValidCards$ Card.Self | RememberSacrificed$ True | SubAbility$ DBDiscardHand | SpellDescription$ Sacrifice CARDNAME. If you do, discard your hand, then put all cards exiled with CARDNAME into their owner's hand.
SVar:DBDiscardHand:DB$ Discard | Mode$ Hand | SubAbility$ DBChangeZoneAll | ConditionCheckSVar$ VaultX | ConditionSVarCompare$ GT0 | References$ VaultX
SVar:DBChangeZoneAll:DB$ ChangeZoneAll | ChangeType$ Remembered | Origin$ Exile | Destination$ Hand | ConditionCheckSVar$ VaultX | ConditionSVarCompare$ GT0 | References$ VaultX
T:Mode$ ChangesZone | ValidCard$ Card.Self | Origin$ Battlefield | Destination$ Any | Hidden$ True | Execute$ TrigGraveyard | TriggerController$ TriggeredCardController | TriggerDescription$ When CARDNAME leaves the battlefield, put all cards exiled with CARDNAME into their owner's graveyard.
SVar:TrigGraveyard:AB$ ChangeZoneAll | Cost$ 0 | ChangeType$ Remembered | Origin$ Exile | Destination$ Graveyard
SVar:VaultX:Remembered$Valid Card.Self
SVar:RemAIDeck:True
SVar:Picture:http://www.wizards.com/global/images/magic/general/knowledge_vault.jpg
Oracle:{2}, {T}: Exile the top card of your library face down.\n{0}: Sacrifice Knowledge Vault. If you do, discard your hand, then put all cards exiled with Knowledge Vault into their owner's hand.\nWhen Knowledge Vault leaves the battlefield, put all cards exiled with Knowledge Vault into their owner's graveyard.