Volos, Cruel Soulwarden

Deathtouch
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)
Whenever another non-Zombie creature you control dies, return it to the battlefield under its owner's control. It's a black Zombie in addition to its other colors and types.