Throne of Seal

Long Hao Chen is a 9-year-old boy who's training to become a knight at the Knight Temple Hall. He passes the knight exam through hard work and the support of his friends. Upon completing the Holy Resurrection Ritual, Long Hao Chen discovers he's a Son of Light, someone with a significant amount of spiritual energy. His teacher Long Xing Yu recognizes his potential and instructs him to develop the strength needed to defeat the Demon Lord alongside him.