Malignus Golgari

Undergrowth — Malignus Golgari enters the battlefield with a +1/+1 counter on it for each creature card in your graveyard.
Dredge 1 (If you would draw a card, instead you
may mill 1 card. If you do, return this card from your
graveyard to your hand.)
Scavenge {4}{b/g}{b/g}{b/g}{b/g} (Exile this card from your graveyard: Put a number of +1/+1 counters equal to
this card's power on target creature. Scavenge only as
a sorcery.)