Regression of the Yong Clan Heir 

Hwalin Yong, once the shattered heir of a fallen martial sect, is thrust back in time-- but he isn’t alone. A monstrous darkness lingers at the edges of his mind, constantly whispering, waiting to claim him. Can Hwalin resist its pull, or will he surrender to the shadow? As the battle within intensifies, he uncovers a dormant power that could reshape his destiny and the fate of his sect. (Source: WEBTOON)