Angel, the Zombie Hunter

Undead Slaying
When Angel, the Zombie Hunter enters the battlefield, you may destroy target Zombie creature. If a creature is destroyed this way, create a 2/2 black Zombie creature token.
Hunter's Precision
Whenever Angel attacks, you may pay {b}. If you do, choose one — destroy target Zombie creature or put a -1/-1 counter on target Zombie creature.
Scavenger's Knowledge
Tap: Exile target Zombie card from a graveyard. If you do, you gain 1 life and draw a card.