Kazgokas, Endless Hunger

Trample, Deathtouch, Menace
At the beginning of each end step, put a -1/-1 counter on each other untapped creature.
When a creature dies, choose one; (X is the number of -1/-1 counters on the creature)
{w}{r}: Deal X damage to target creature or planeswalker and gain X life.
{b}{g}: Return target creature with converted mana cost X or less from the graveyard to the battlefield