The Stone of Miya

In a world where magic is strictly hierarchical and power reigns supreme, Su Heng, a youth from the Blue Shore Village, cares little for pursuing magical prowess and only wishes to live an ordinary life. One night, his village is razed by an army of elite mages, his family is killed, and his close friend Su Lan is gravely wounded by a black blade before mysteriously disappearing. On the brink of death after falling off a cliff, Su Heng is saved by Miya, an ancient being slumbering within a pendant left by his sister. Upon awakening, he becomes symbiotically linked with Miya, an ancient magic core with its own consciousness, granting him power that can shake the world. Su Heng embarks on a journey to find his friend, honing his magic in the slums of Grey Street and investigating the secrets of the black blade, but he must confront a cruel choice: to seek the gods and rescue Su Lan, or to be consumed by the ancient power and lose the humanity he swore to protect. — Description from novelcodex.org