Jarad, Golgari Lich Lord

Jarad, Golgari Lich Lord gets +1/+1 for each
creature card in your graveyard.
{1}{b}{g}, Sacrifice another creature: Each
opponent loses life equal to the sacrificed
creature's power.
Sacrifice a Swamp and a Forest: Return Jarad
from your graveyard to your hand.
Aside from the Greater Will, there is the Formless
Mother, the God of Scarlet Rot, and the Frenzied
Flame.