Knowledge Vault [Legends] BW99 Set: Legends Type: Creature —

Set: Legends Type: Creature — Horror Rarity: Rare Cost: {3}{B}{B}{B} First strike

Whenever an opponent sacrifices a nontoken permanent

"I did offer them a choice

Set: Anthologies Type: Land Rarity: Rare {T}: Add {C}

Set: Black & White: Black Star Promos Type: Item Rarity: Promo

Knowledge Vault [Legends] BW99 Set: Legends Type: Creature —Set: Legends Type: Artifact Rarity: Rare Cost: {4} {2}, {T}: Exile the top card of your library face down. {0}: Sacrifice Knowledge Vault. If you do, discard your hand, then put all cards exiled with Knowledge Vault into their owner's hand. When Knowledge Vault leaves the battlefield, put all cards exiled with Knowledge Vault into their owner's graveyard.