Mortal Bones Are Broken? No, No, I'm Different from You

The once astonishing talents fell from the mortal world overnight. When his spiritual roots were shattered, his engagement contract turned into dust, and even ants dared to trample on his dignity, he turned around in silence and walked towards the deepest part of the family's forbidden area. There, the ancient existence that once made the world tremble is sealed. The Demon Lord laughed wildly and promised supreme power, but he shook his head and handed over a cold contract. "Use my broken body as a sheath and imprison you for ten years as a blade." From then on, the good-for-nothing young man took charge of the world-destroying demon, using his body as a prison and his life as a chess piece to repay his blood debt to fate on this road of no return.