Magma Opus is a mythic Instant card from Strixhaven: School of Mages Promos (PSTX), collector number 203p. Current market price: $1.06 (foil $2.43), TCGplayer market prices via Scryfall.
Magma Opus deals 4 damage divided as you choose among any number of targets. Tap two target permanents. Create a 4/4 blue and red Elemental creature token. Draw two cards. {U/R}{U/R}, Discard this card: Create a Treasure token.