Increasing Vengeance is a mythic Instant card from Strixhaven Mystical Archive (STA), collector number 40. Current market price: $4.73 (foil $9.50), TCGplayer market prices via Scryfall.
Copy target instant or sorcery spell you control. If this spell was cast from a graveyard, copy that spell twice instead. You may choose new targets for the copies. Flashback {3}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)