Blot Out the Sky is a mythic Sorcery card from Strixhaven: School of Mages (STX), collector number 335. Current market price: $2.97 (foil $4.15), TCGplayer market prices via Scryfall.
Create X tapped 2/1 white and black Inkling creature tokens with flying. If X is 6 or more, destroy all noncreature, nonland permanents.