Sign in from the Magician

This is a world full of monsters. In order to fight against the monsters, people have developed the profession of magician, using the corpses of monsters to refine magic weapons. By chance, Zhao Yu discovered that he could actually get a chance to sign in through the demon's corpse. "Congratulations on signing in to get the Mask of the Night!" "Congratulations on signing in to get the heart of the undead!" … "Demon Refiner, I must become a Demon Refiner!" Zhao Yu made up his mind, "Only in this way can we purchase the bodies of demons reasonably and legally."