Miasma Demon 
Creature — Demon
Flying When this creature enters, you may discard any number of cards. When you do, up to that many target creatures each get -2/-2 until end of turn.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL