Slay the Gods: Mo Ran, Agent of the Gods

He transmigrated into the world of Slay the Gods and awakened as Mo Ran's proxy. An evil god was sealed inside him, and every time he used his power, he lost a piece of his memory. The day his memories ran out would be the day the evil god descended.

Lin Qiye: “Who are you, really?”

Lin Mo: “Someone... who's about to forget himself completely.”