Only Pets Can Cultivate Immortality

This is a world where humans cannot cultivate, but monsters and monsters can. Human beings sign contracts with monsters and turn them into their own monster pets. Through the cultivation and advancement of monster pets, humans can gain mana and supernatural powers. Here, countless skills, stunts, elixirs, and magic weapons are all prepared for demon pets. Only the stronger the demon pet is, the more powerful the humans who sign a contract with it will be.