An RPG simply isn't an RPG without a collection quest ending in a super special weapon, which is exactly what the Forged of Star-Stuff quest in Avowed is. You'll need to track down the location of four pieces of rare starmetal across the Living Lands and bring them to the one blacksmith qualified to turn them into a superb quality weapon—or two superb quality weapons, if you actually collect all four pieces of starmetal.
Right below I'll lay out where Forged of Star-Stuff actually ends and the different possible weapons you can choose as rewards, along with the specific locations of all four pieces of starmetal. The quest won't actually be marked complete until you collect and use all four pieces, so you probably want to check this one off your list for the sake of the XP even if you only want one of the weapons.
