Decayed Husk

Whenever Decayed Husk enters or leaves the battlefield, put a 1/1 green Saproling creature token onto the battlefield.
Sacrifice a Saproling: put a -1/-1 counter on target creature.
{1}{p/b}{p/g}: Exile this card from your graveyard and put a token onto the battlefield that's a copy of this card. Activate this ability as a sorcery.