Tarvaxis, Eldrazi God

+3: You may exile target creature an opponent controls. If you do, exile target creature you control.
-5: You may play a creature card from exile for its converted mana cost. It becomes colorless and an eldrazi in addition to its other types.
-15: Name three eldrazi cards in your deck or outside the game, reveal them, and put them onto the battlefield under your control.