Mayork Eldunara

Vengeance - Whenever a non token creature you control dies, put a vengeance counter on this card.
{t}{3} - Remove x vengeance counters from Mayork Eldunara. Return target creature card from graveyard to the battlefied with converted mana cost less than or equal to x. That creature gains haste. At the beginning of the next end step, sacrifice that creature.