Who Says That a Weapon Refiner Can Only Refine Weapons?

"Remember, as a weapon refiner, repeated training is only your basic skill." "I understand, master, can you stop first! My disciple can't hold it anymore!" "Where is the point of stopping in practice? Besides, this is only 50 times, so hold on." The young man in gray robes held a hammer bigger than himself and swung it at the thin young man in front of him, and laughed heartily from time to time. "Master said that we weapon refiners have no way to save our lives except for a magic weapon, so he asked me to forge this body."