Wei Ying (魏婴 Wèi Yīng), courtesy name Wei Wuxian (魏无羡, Wèi Wúxiàn) is the founder of the Demonic Cultivation and a former disciple of the Yunmeng Jiang Sect. He is the only son of Cangse Sanren and Wei Changze.
Also known as the Yiling Patriarch (夷陵老祖, Yílíng Lǎozǔ), he died in the first siege of the Burial Mounds thirteen years prior to the start of the story. He was then incarnated into the body of Mo Xuanyu through a sacrificial ritual. Through a series of coincidences involving a search for dismembered body parts across northern China with Lan Wangji, the truth behind Wei Wuxian's death is slowly revealed throughout the course of the novel.