Rimuru The Yellow Primordial?
In the tense battle of Tenma war, Feldway. The phantom king, manage to get rid of Rimuru by throwing him in the end of Space and Time. Rimuru, Who is trap in the vast sea of nothingness. Manage to escape to return to his original timeline by the help of his trustworthy partner, and his Manas, Ciel. However, due to so...