Spiteful Prankster 
Creature — Devil
During your turn, this creature has first strike. Whenever another creature dies, this creature deals 1 damage to target player or planeswalker.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL