Cengjing You Yongshi

Ell is the strongest dragon in the Demon Realm and has grown tired enough of being unbeatable that he dreams of finally dying and enjoying a peaceful afterlife. When yet another hero fails to kill him, Ell decides on an absurd solution: if the world cannot produce a warrior strong enough, he will raise one himself. Meeting the magician Lafi gives him the perfect candidate in her son, Dino. What begins as a long-term plan for his own defeat quickly becomes something far more demanding, because training a future hero is easy compared with becoming a father.