Knowledge Vault [Legends] Gateway 2007 What walks on four legs

What walks on four legs in the morning

Set: From the Vault: Relics Type: Artifact Rarity: Mythic Cost: {1} {T}: Add {C}{C}

Creatures of the chosen type have fear

though he never fully comprehended its mystical runes

Burning fervor and fearsome skill create a lethal beauty terrible to behold

Knowledge Vault [Legends] Gateway 2007 What walks on four legsSet: 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.