Prismatic Ending is a rare Sorcery card from Secrets of Strixhaven Mystical Archive (SOA), collector number 7. Current market price: $0.52 (foil $1.67), TCGplayer market prices via Scryfall.
Converge — Exile target nonland permanent if its mana value is less than or equal to the number of colors of mana spent to cast this spell.