In this world, there is a kind of power called spiritual power. Spiritual power suddenly appeared 3,000 years ago. Even after 3,000 years, humans have not solved this problem. It can make living things evolve. Animals, plants and insects, after absorbing spiritual power, will evolve IQ and language systems equivalent to humans, and can use spiritual power. Such animals, plants and insects that can use spiritual power are collectively called spiritual beasts. But spiritual power is divided into ten types, namely gold, wood, water, fire, earth and light. Wind, thunder, darkness, and sound depend on humans. After absorbing spiritual power, they can use many different abilities, but spiritual beasts can only use one kind of spiritual power. Unlike humans, humans can use a variety of spiritual powers after absorbing spiritual power. Many years later, humans invented a contract, and this contract was concluded with the spiritual beast. As long as the spiritual beast agrees to sign a contract with him, humans and spiritual beasts can be fused together. Spiritual beasts and humans can use each other's abilities, and their consciousness can be freely exchanged.
