Orzhov Euthanist 
Creature — Human Assassin
Haunt (When this creature dies, exile it haunting target creature.) When this creature enters or the creature it haunts dies, destroy target creature that was dealt damage this turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL