Hungry Deviljho

Invader {1}{g}{b} (You may cast this spell for it's invader cost if you were dealt combat damage since your last end step.)
Whenever a creature dealt damage by Hungry Deviljho would die this turn, put X +1/+1 counters on Hungry Deviljho, where X is that creature's toughness.
{2}{g}: Hungry Deviljho fights target creature you don't control.