Gorfinax the Risen Hunger

Deathtouch, Lifelink, Menace, Indestructible
When Gorfinax enters the battlefield, and at each upkeep, put -1/-1 counters on each creature equal
to its converted mana cost.
Gorfinax gets +1/+1 each time a creature dies.
If Gorfinax the Risen Hunger would leave the
field, exile it, then return it to the battlefield
transformed and tapped.