Nekrah, Lord of the Horde

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 Nekrah or another creature you
control dies, if it had a +1/+1 counter on it, you
may pay {2}. When you do, return it to its
owner's hand.