Blood of Will

Mu Yu traveled to a lost era of human civilization and obtained the supernatural system. Humanity once developed to a very high level. Due to unknown reasons, this extremely developed civilization suddenly collapsed. However, the cities built by humans seemed to have self-awareness and operated on their own, maintaining it. What continues to operate is a kind of energy called superpower. When this energy is used, it will leave the supernatural factors as ashes and other things. The supernatural factors contain the energy necessary for the development and existence of the supernatural system. They also contain the memories of deceased friends, the truth of history, and advanced ancient technology.