Athelluhl, The Dismemberer

First strike, wither (This deals damage to creatures in the form of -1/-1 counters.)
Whenever a -1/-1 counter is placed on a creature, create a colorless limb artifact token
with "{t}, Sacrifice this artifact: Gain 1 life."
Sacrifice six limbs: Create a 5/5 black Zombie Horror creature token with Wither.