Malomar, Bodymass of the Abyss

Malomar gets +2/+2 for each creature card in your opponent's graveyards.
Bestow {b}{b}(If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Enchanted creature gets -3/-3 and has "this creature gets +2/+2 for each creature card in your opponent's graveyards."