Comeuppance [Murders at Karlov Manor Commander]

Set: Murders at Karlov Manor Commander Type: Instant Rarity: Rare Cost: {3}{W} Prevent all damage that would be dealt to you and planeswalkers you control this turn by sources you don't control. If damage from a creature source is prevented this way, Comeuppance deals that much damage to that creature. If damage from a noncreature source is prevented this way, Comeuppance deals that much damage to the source's controller.