Graf Reaver is a rare Creature — Zombie Warrior card from Innistrad: Crimson Vow (VOW), collector number 115. Current market price: $0.19 (foil $0.24), TCGplayer market prices via Scryfall.
Exploit (When this creature enters, you may sacrifice a creature.) When this creature exploits a creature, destroy target planeswalker. At the beginning of your upkeep, this creature deals 1 damage to you.