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.
![Comeuppance [Murders at Karlov Manor Commander]](http://www.cardmerchanttakapuna.co.nz/cdn/shop/files/535584.jpg?v=1714482802&width=1445)