Avarice, Gravecaller

+1: Put the top two cards of your library into your graveyard. Then, return a card at random from your graveyard to your hand.
-3: Exile target creature card in your graveyard. If you do, creatures you control gain all abilities that creature had.
-6: Sacrifice any number of creatures. You may put a creature card from your hand onto the battlefield for each creature sacrificed this way.