After Being Abandoned by the Protagonist, I Ascended to the Position of Demon Lord

Traveling through the world of immortality, there is no system and no golden fingers. The regulations only require B-level qualifications. It took him hundreds of years to gradually catch up with the world's genius from a small sect disciple. Everyone says that he is unparalleled in resourcefulness and is an indispensable part of the battle to save the world. But it wasn't until the day the Demon Lord was defeated that he finally understood. He is just a pawn. The son of luck enjoys the glory, and he is responsible for the aftermath. The son of destiny accepts worship from all living beings, but he is not even qualified to participate in the final battle. Just when Fang Gui was completely desperate. The demon king who was supposed to die reached out to him in a world where time stood still. "Do you want to know why it's like this?" "Because you're so kind." "It's sad that good intentions will be trampled under people's feet!" From that day on. The rules are completely dead. Only the newly promoted Demon Lord. He no longer trusts anyone. He wants to overturn the entire world with his own hands.