Mystic Revival: Starting as a Ghost Servant

In a world defiled by the five poisons, hell stands empty. Vengeful spirits have awakened, and the mortal realm has become a living prison. Ghosts cannot die—only ghosts can fight ghosts. Understanding the rules that govern each specter is the sole law of survival for ordinary humans. But for Wang Gui, who has already become a ghost himself, such concerns no longer apply. The only question that haunts him is far more fundamental: is he still human, or has he truly become a monster? Staring at the pale, deathly hands beneath his sleeves, he voices his first doubt in this new and terrifying existence. (Mystic Revival fanfiction) (Overpowered protagonist)