Gloomhowler

Hexproof
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.)
When Gloomhowler enters the battlefield, put a
+1/+1 counter on target creature you control.
If that creature is a Wolf or Werewolf, put two
counters on it instead.