The following two novels met the requirements: 1. " I Cultivate in the World of Monsters and Demons with Krypton Gold ": The protagonist, Wang Han, obtains Krypton Gold in the World of Monsters and Demons to increase his cultivation technique realm and special ability. He also increases the bloodline power of demonic beasts and becomes the peerless overlord of the demonic beasts. It was a fantasy novel about a high-level martial arts world. 2. "I'm Raising Demon Beasts on the Douluo Continent, Shocking Gu Yuena": The main character Bai Yuan accepted a soul beast as his disciple instead of accepting anyone. A soul beast could only transform after a hundred thousand years, and after that, it had to start all over again. It was a light novel, a derivative doujinshi novel.