Not brainless, the details are in place. Chi Yuan, the evil envoy of the Underworld's Evil Punishment Department, recruited two people from the human world in order to avenge his senior brother (Yang Yifan's ghost eyes, which can see through everything, and his eyes can identify all the most perfect options, and Sun Youqian, who has the same ghost and martial arts body as his senior brother) and trained them with all their heart. Through various tasks, they are constantly tempered so that they can later become the sharp swords that kill their senior brothers.
Task levels of the Department of Punishing Evil: Humans remember evil, monsters remember evil, ghosts remember evil, Yuan remembers evil, and revenge and punishment with reward
The levels of the Evil Envoy: green cloak, red cloak, white cloak, black cloak, and each cloak corresponds to upper, middle and lower levels.
There are four types of magic weapon levels: magic weapon, treasure weapon, magical weapon, and fairy weapon. Horcruxes are among them, and their strength depends on the strength of the host soul.
Various magical physiques: ghost body, ghost body, ghost eyes, etc.
...
If possible, I hope you are kind, but don't know anything about evil, because the world is not simple.
The events in this story are fictitious and any similarity is purely coincidental.
Because there is a preliminary introduction in the grand prologue of the world view after Chapter 28