Proteus Staff [Mirrodin]

Set: Mirrodin Type: Artifact Rarity: Rare Cost: {3} {2}{U}, {T}: Put target creature on the bottom of its owner's library. That creature's controller reveals cards from the top of their library until they reveal a creature card. The player puts that card onto the battlefield and the rest on the bottom of their library in any order. Activate this ability only any time you could cast a sorcery.