Ahoskarthunai, the Vengeful

Your graveyard can't be affected by spells or abilities as long as Ahoskarthunai, the Vengeful is in the command zone.
Ahoskarthunai, the Vengeful can't be countered
Pay X life: Exile X creatures from your graveyard with Ahoskarthunai, the Vengeful. Ahoskarthunai, the Vengeful power and thoughness is the sum of all creatures exiled this way. Ahoskarthunai, the Vengeful has all the abilities of all creatures exiled with him.