King Jingwu

A long time ago, he was short of food and clothing and followed his master. Later, his master was approached by enemies of the Demon Sect. After a bloody battle, his master was killed. He was seriously injured and escaped with his life... In the years that followed, no one knew how he came to be... Many years later, when people who knew him talked about him, they could not help but sigh: The boy who slays demons will eventually become a demon.