The Monk and the Dragon

When Cang Qiong the monk stops a fight between a pair of Loong brothers, he accidentally kills Bai Mo, a Diven Loong. Full of remorse, he spends the next ten years searching for his soul fragments and creating a younger version of Bai Mo using his blood and qi. Their life is peaceful until Bai Rong, another Divine Loong drops in on them uninvited.