Yun Jibai, an abandoned disciple in Hanyuan Forbidden Land, was carrying a life-defying bone. His bones were cut out by his master and his veins were severed, and he was expelled from the sect, staining the nine heavens with blood. Five years later, using the Demonic Abyss as his furnace and his resentment as fuel, he reversed the path of heaven and split the Nine Heavens Chain with one sword. However, Xie Wudu, the former cold-blooded chief disciple, actually sacrificed his body to feed the devil and was willing to stand on the mountain of corpses and sea of blood at his feet. The world scolded Yun Jibai for his rebellion and turning into a demon, but they didn't know that Xie Wudu had already carved his life soul into his bones and blood - "If you become a demon, I will accompany you to become a demon forever", which is an oath stronger than the heavenly calamity.
After Yun Jibai was driven out, he sneaked into the Demonic Abyss of the Earth, devoured thousands of souls with his remaining body, and refined it into the ninth layer of hell fire. Once he broke through the boundary, he washed the Hanyuan Mountain Gate with blood. Xie Wudu was ordered to capture and kill him, but when the blade of the sword reached his throat, he removed all his spiritual veins with his backhand and poured his Taoist foundation into his body: "The path you took should have been taken by me." It turned out that Xie Wudu's bone-cutting punishment was to exchange a life talisman for his life, pretending to defect. Yun Jibai was furious and wanted to burn the sky, but Xie Wudu smiled: "If you hate me, I will take my life to change your destiny." From then on, every time Yun Jibai broke through a realm, Xie Wudu's soul was shattered until the body and spirit were about to be destroyed. When the Nine Heavens Thunder Tribulation fell, Yun Jibai picked up Xie Wudu, who was like a withered bone, and tore open his life core: "You died once for me, this time, I will live for you." The two souls burned together and reversed the way of heaven. From then on, Hanyuan no longer had a master or disciple, only one was left holding the sword, and the other was bone, and they walked together.
