Muzakar Yeti

Whenever Muzakar Yeti or another creature enters the battlefield from your graveyard, target player puts the top X cards of his or her library into his or her graveyard, where X that creature's power.
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.)