Knowledge Vault [Legends] Ooze you may exert it as

you may exert it as it attacks

it gains the following effect

Special Summon 1 "Destiny Hero" monster from your Graveyard (except a "Destiny Hero - Fear Monger") during your next Standby Phase

Dragon" cannot attack during this turn

"I have always imagined my mother as such a woman

Knowledge Vault [Legends] Ooze you may exert it asSet: 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.