I think the fantasy novel "Supreme Dragon Vein" would be very suitable for you because its main character, Ye Liuyun, also uses dragon veins to cultivate. On the day of the heavenly punishment, the little beggar Ye Liuyun was unexpectedly possessed by a spirit dragon. After the dragon vein fused, he forged a king's physique! Not only did he want to destroy the empire, but he also wanted to seek a long path to immortality. I hope you like this fairy's recommendation. Muah ~😗