Selenia, the Cursed Heart{4}{W}{B}

Legendary Creature — Angel Warrior

Flying, lifelink If you would gain life, you gain twice that much life instead. When Selenia dies, create a legendary black Aura Curse enchantment token named Selenia's Curse attached to target opponent. The token has enchant player and "If enchanted player would lose life, they lose twice that much life instead."