Each forge has its own unique shader. Weapons forged at Volundr give Satous tribe, Gofannon give House of Meyrin, and Izanami gives Rasmunnen (i may have it mixed up) Bergusia Night comes from curated raid weapons. Havent seen one from a Bergusia forge weapon yet. Refurbished black armory is a rare shader meaning its not guaranteed upon dismante. Get random weapon droos from forges/sabetoeurs NOT FRAMES and pray to RNGesus. New age black armory comes from most raid and forge weapons.