Byonjo Doll

At the beginning of your upkeep, if you control 3 or more artifacts, you may search your library for an artifact with casting cost {x}, exile it, and then shuffle your library. You may cast cards exiled this way for as long as Byonjo Doll is on the battlefield or in the graveyard.
Exile Byonjo Doll : exile target permanent.
Indestructible.