Zannah, Lady of the Sith

Zannah, Lady of the Sith gets +1/+1 for each creature card in your graveyard.
{1}{b/g}{b/g}, Sacrifice a creature: each opponent loses
life equal to the sacrificed creature’s power.
Any time a non-token creature you control is put
into a graveyard from anywhere, you may pay {1}{b/g} and put a token onto the battlefield under
your control that is a copy of that creature.