Demon Cultivation: Starting with Goblin Swarms

An old demonic cultivator in the cultivation world awakens one day, only to find himself in a Western fantasy world. He seizes the body of a useless nobleman who is about to be exiled to the border. What does it mean to have no reproductive barriers? What does it mean to reproduce using soil and stone? What are background characters and NPCs in all the major worlds? What are lowly demons? These aren't lowly demons at all. They're perfect specimens for a demonic cultivator to raise his Gu. Goblins, you are my gods!!