Nan Tiandu

Death
Nan Tiandu did fight in the Internal Conflict of Cloud Mist Sect ,where the Third Elder took Control of the Sect and Crippled the Second Elder. Nan Tiandu faught his way to his Master but he ordered him to save his Junior-Sister Zhu Sijia who was taken as prisoner. But he coudn't save her and deadly wounded Jumped into the Evil Dragon Abyss.

Rebirth
Later Ye Chuan was asked to look into the Evil Dragon Abyss by the Seventh Elder. With his Demonic Dragon Body he can witherstand the Blood mist, so he togeher with Ye Long dived they into and found the Evil Dragon with the Seal almost destroyed. And Surprising they head Nan Tiandu's calls. His Body was Destroyed but his Spirit survived. With the help of Seventh Elder Ye Chuan kill the Dragon and with the Dead Evil Dragon did Nan Tiando rebirth, or rather Fuse with the Dragon Spirit into his Body.