The Weakest Devil Contractor

"Only the one who stands to the end is the winner. Those guys who are complacent about the fruits of temporary success will eventually become stepping stones on the road of history, and I will be the one standing to the end." Said Cheng Yuming, the great demon king whose talent is closest to that of gods, who signed a contract with the devil and has an unknown destiny. There is no need to explain a willful life, and it is inevitable to save the world.