The Forgemaster

Metalcraft : The Forgemaster has Indestructible
as long as you control three or more artifacts.
{r}{2}: Sacrifice another artifact: Destroy target
artifact or enchantment.
{b}{2}: Sacrifice another artifact: Return target
artifact in your graveyard to the battlefield.
{u}{2}: Sacrifice another artifact: Search your
library for an artifact card and put that card
into your hand.