If the Fairy Sect Is Unfair, Then It Will Lead to the Devil's Path

In the war ten thousand years ago, the Demon Lord disappeared and the Immortal Lord was created. The two races also fell from the hegemony. The human race was always recharging its strength but also attached to the Immortal Race. The Demon Lord was also waiting in the secret realm for the arrival of the son of prophecy to reveal the truth of the world. (In the early stage, the protagonist will definitely not be possessed quickly, but will be possessed with a little excitement.)