Vaal Hazak

Flying, Vigilance, Wither, Exploit

Whenever a creature you control exploits a creature,
each creature other than Vaal Hazak gets two -1/-1 counters.

Whenever a creature with a -1/-1 counter on it dies,
put a +1/+1 counter on Vaal Hazak.

{t},{b}{g}{u}: Remove a +1/+1 counter, then
put a -1/-1 counter on each other creature.