Big Score is a rare Instant card from Secret Lair Drop (SLD), collector number 7076. Current market price: $3.29 (foil $3.24), 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.")