Magma Opus is a mythic Instant card from Strixhaven: School of Mages (STX), collector number 346. Current market price: $3.04 (foil $4.33), 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.