Hao Ren initially thought that spiritual detective like Pierre who walked on the edge of the magic field would not provide any good intelligence, so he did not care what he said. After all, a spiritual detective was only akin to scavenger of the mysterious world. All they could obtain was just the shallow knowledge that the otherworldlings disdained. Even the demon hunters had little interest in this group of people who lived between humans and otherworldlings. However, Hao Ren had overlooked something: many things had escaped the hunting of the demon hunters after the 'collapse of the myth.' The final movement of those things happened to be in the hands of the human beings who had been taken lightly by everyone else.
It was just that the number of these heritages was scarce and scattered, and no one could care less during the decline of the mystical doctrine.