When Massacre Girl enters the battlefield, each other creature gets -1/-1 until end of turn. Whenever a creature dies this turn, each creature other than Massacre Girl gets -1/-1 until end of turn.
Near Mint - $0.30
Lightly Played - $0.30
Played - $0.30
Heavily Played - $0.20
Damaged - $0.20
Near Mint Non-English - $0.30
Lightly Played Non-English - $0.30
Played Non-English - $0.30
Heavily Played Non-English - $0.20
Damaged Non-English - $0.20