Cthulhu

Almighty, indestructible, hexproof When you cast a spell, instead exile that card and cast another card you own in exile chosen at random without paying it's mana cost. When you cast that card, it ignores this effect. Your opponents can't draw cards. Players can't gain life. Cthulhu can't be exiled.
Whisper him the madness of which you own, and he displays it with power.