Nel'Vozsh, Unborn Maw

Deathtouch
When you cast Nel'Vozsh, Unborn Maw,
destroy target noncreature nonland permanent
with converted mana cost less than or equal to
the amount of {g} spent to cast it, then exile a
card from a graveyard for each {b} spent to cast it.
Nel'Vozsh enters the battlefield with a +1/+1
counter on it for each card exiled this way.
Such hunger cannot restrain itself.