Graveborn

Your Commander is a Zombie in addition to
its other types.
Zombies and Skeletons you control have
Undying. (When a permanent with Undying is put
into a graveyard from the battlefield, 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.)
"For I am Death. And I am not the end, but a
beginning." — Myrkul Lord of Bones