Finish the Masterwork Weapon is an early-game quest you can pick up as you wander around the Blighted Village and read Highcliff’s journal in Baldur’s Gate 3. The quest ends with you needing to find the Melting Furnace to obtain a Sussur Weapon.
In this guide, you’ll learn precisely how to get to the Melting Furnace in BG3 so you can complete the Finish the Masterwork Weapon quest.