Ghoulcaller's Harvest (Extended Art) (MID-372) - Innistrad: Midnight Hunt: (Extended Art)

Create X 2/2 black Zombie creature tokens with decayed, where X is half the number of creature cards in your graveyard, rounded up. (A creature with decayed can't block. When it attacks, sacrifice it at end of combat.)
Flashback {3} (You may cast this card from your graveyard for its flashback cost. Then exile it.)