
Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature.
Blowfly Infestation has 3 printings, first in Shadowmoor (2008). EDHREC ranks it #3,052 among Commander cards. It appears most in Auntie Ool, Cursewretch decks (19,539 on EDHREC). 1 public deck on TCG runs it. It has 2 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.