Slaying the Human Heart

Uesugi Nao stood at the top of a mountain and watched the battle from afar with a complicated expression.

She had contracted Great Skyfiend to obtain strength. Indeed, she had obtained extremely powerful strength in a short period of time.

For a while, Uesugi Nao even believed that her actions would become mainstream and she, a pioneer of humanity's future.

However, things didn't seem to develop in the direction she had expected. Although there were indeed many humans who chose to contract with Guardians and become contractors, Guardians didn't become humanity's mainstream. The Holy Spirit Association advanced with Spirit Casting and Hui Haifeng produced Mythical Serum. There were also humans like Human Sovereign and Deceit King who had advanced to the Mythical stage using some unknown method.