Flameborn Fiend

Trample
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.)
Megamorph {2} (You may cast this card face down
as a 2/2 creature for {3}. Turn it face up any time for
its megamorph cost and put a +1/+1 counter on it.)