Lightning Skelemental 
Creature — Elemental Skeleton
Trample, haste Whenever this creature deals combat damage to a player, that player discards two cards. At the beginning of the end step, sacrifice this creature.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL