Exauster of Skulls

{b/g}, Exile a creature card from your graveyard: Exauster of Skulls gets +1/+1 and gains hexproof until end of turn.
Dredge 3 (If you would draw a card, instead you may put exactly 3 cards from the top of your library into your graveyard. If you do, return this card from your graveyard to your hand. Otherwise, draw a card.)