Gloomdrifter 
Creature — Zombie Minion
Flying Threshold — As long as seven or more cards are in your graveyard, this creature has "When this creature enters, nonblack creatures get -2/-2 until end of turn."
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL