The World-Painter

The World-Painters power is equal to your
devotion to red, and her toughness is equal to your devotion to
blue.

Whenever you cast an instant or sorcery, exile
the top X cards of your library, where X is the
amount of mana spent to cast that spell. Then,
The World-Painter deals Y damage to any target, where Y is the total mana value of cards
exiled this way this turn.