Crackow, God of oaks

0: Choose 2 cards from graveyards and fight them against target creatures you don't control.
-3: Pick three cards. You may put a creature card from those cards and add it's power to a creature already on the battlefield.
-5: Sacrifice a creature: You may pick as many cards as it's power and toughness combined.You can put 1 of the creatures onto the battlefield tapped.