Knowledge Vault [Legends] Scourge you may pay {1} any

you may pay {1} any time you could cast an instant

loses all abilities

Set: New Phyrexia Type: Legendary Creature — Praetor Rarity: Mythic Cost: {6}{G}{G} Trample

Set: Limited Edition Alpha Type: Artifact Rare Cost: {5} {5}

"Many are in high place

Knowledge Vault [Legends] Scourge you may pay {1} anySet: Legends Type: Artifact 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.