He was originally a locksmith hired by the archaeological team, but was accidentally trapped in a thousand-year-old tomb due to a volcanic eruption. When the blood moon eclipsed the sky and human civilization collapsed into wasteland, he was trapped at the bottom of the tomb for a whole month, surviving by eating mold from the burial pots. In the early morning of the 30th day, blue corpse poison seeped out of the bronze coffin and drowned him, but when he was about to die, he awakened the spiritual devouring system that can devour ghosts.