This is a kind of inner demon in the journey of cultivating the Tao. Back then, Ziwei Sect insisted on going his own way, which led to the destruction of the entire sect in the battle of the Demon Realm. Lord Ziweixing felt extremely guilty and disheartened, and wanted to die. If he hadn't been thinking about the secret inheritance, he would have died. I'm afraid it has been dead for a long time....