Curse of Vengeance is a rare Enchantment — Aura Curse card from Commander 2016 (C16), collector number 12. Current market price: $7.80, TCGplayer market prices via Scryfall.
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.