Curse of Vengeance 
Enchantment — Aura Curse
Enchant player Whenever enchanted player casts a spell, put a spite counter on this Aura. When enchanted player loses the game, you gain X life and draw X cards, where X is the number of spite counters on this Aura.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL