Each creature card in your graveyard has
scavenge . The
scavenge cost is equal to its mana cost
(mana cost, exile this card from your graveyard : Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.).
Sacrifice another creature:
Regenerate Varolz, the Scar-Striped.
(The next time this permanent would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)