High Priest of Mor'Chai

All other Zombies get +2/+2 and
"{w/b}, {t} : Regenerate target Zombie."
All non-Zombie creatures get -2/-2. For every creature destroyed this way, put a Zombie token into play under your control. These count as 1/1 black creatures.
Au'Torms worked with the dead so much that they learned how to take care of themselves.