Abyssal Cur

Annihilator 1 (Whenever this creature attacks, defending player sacrifices one permanent.)
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.)
Unearth {2} ({2}: Return this card from your
graveyard to the battlefield. It gains haste. Exile it at
the beginning of the next end step or if it would leave
the battlefield. Unearth only as a sorcery.)