Hi guys. I read a novel. I forgot to remember the title. I just remember the vague idea of first few chapters. In the novel immortal emperor is reincarnated into a 15 year old. He had 13 generals. The day he reincarnated the whole city was destroyed and killed because of a dragon. He was reincarnated into the only survivor. The dragon scales were stolen by some ji clan.. This guy goes and kills the dragon. Only survivor left was taken as a disciple. The left the place early to a different sect through the forest to avoid suspicion of others. Anyone please let me know the title if you have read novel. I don't remember where I read it. Either Babel or webnovel.