Undergrowth
MTG Mechanic
Each undergrowth ability is different, so read each carefully to see exactly how all these corpses are going to help you. Golgari decks are highly interested in filling the graveyard. Creature combat is a fantastic way to do that, but discarding cards and dumping cards from the top of your library into your graveyard are just as effective. Undergrowth abilities provide scaling effects that may start small, but they can be dominating in the late game.