Devouring Light is a uncommon Instant card from Ravnica Remastered (RVR), collector number 305. Current market price: $0.27 (foil $0.25), TCGplayer market prices via Scryfall.
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Exile target attacking or blocking creature.