
Nonblack creatures get -1/-1 until end of turn.
Festergloom has 2 printings, first in Magic 2015 (2014). EDHREC ranks it #23,503 among Commander cards. It appears most in Maha, Its Feathers Night decks (775 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.