Unstoppable Slasher is a rare Creature — Zombie Assassin card from Secret Lair Drop (SLD), collector number 2589. Current market price: $48.47, TCGplayer market prices via Scryfall.
Deathtouch Whenever this creature deals combat damage to a player, they lose half their life, rounded up. When this creature dies, if it had no counters on it, return it to the battlefield tapped under its owner's control with two stun counters on it.