From Servant to Demon Lord: Awakening the Primordial Chaos Body

A servant thrown into the Waste Spirit Valley with broken limbs unexpectedly awakens the supreme Primordial Chaos Spiritual Root! Framed by Liu Shaobai and scorned by the sect, Lin Yan escapes death with the token gifted by Saintess Su Qingyao. Suppressed by the sect's prodigies, he ventures into secret realms and demon abysses, gradually subduing myriad demons to claim the throne of the Demon Lord. The world says demons are inherently evil, but he defies fate with a demonic body to protect his childhood sweetheart, break the curse against heaven, and make the lofty Qingyun Immortal Sect look up to the mortal youth who crawled back from hell. — Description from novelcodex.org