Sog, Plundering Crustation

{b}{u}{g}, {t}, Remove a +1/+1 counter from target creature you control: Put two target creature cards from your graveyard onto the battlefield combined under your control. They become a mutant in addition to their other types.
Whenever a creature an opponent controls dies, you may put a +1/+1 counter on target creature you control. That creature becomes a mutant in addition to its other types.