Deathwalker Krahn

Whenever a creature dies this turn, if it was damaged by Deathwalker Krahn this turn, put a +1/-1 counter on Deathwalker Krahn.
{b}{b}{b}: Deathwalker Krahn gets +1/+0 until end of turn.
The Krahn were a fearsome race before the genocide of their entire species. Somehow, they became even more terrifying after they died.