Rout is a rare Sorcery card from Conspiracy (CNS), collector number 80. Current market price: $0.30 (foil $6.78), TCGplayer market prices via Scryfall.
You may cast this spell as though it had flash if you pay {2} more to cast it. (You may cast it any time you could cast an instant.) Destroy all creatures. They can't be regenerated.