Big Score is a rare Instant card from Secrets of Strixhaven Mystical Archive (SOA), collector number 38. Current market price: $2.02 (foil $3.84), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, discard a card. Draw two cards and create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this token: Add one mana of any color.")