Tiredness? Pain? What do... these things amount to... I am only the way I am today because of him! In order to obtain the power to kill him and take my revenge, I have endured pain that is beyond all of your imaginations!! Even now, I am still plagued by this enormous, unending pain! And with every breath, this pain reminds me to never ever forget this grudge!”— Fen Juechen to Xiao Lingxi about Yun Che 
Fen Juechen is a member of the Burning Heaven Clan and the youngest son of the clan master. He is the only survivor of the Burning Heaven Clan, after Yun Che spared him due to Xiao Lingxi's request. He underwent reincarnation afterwards and his connection to the Eternal Night Royal Family was revealed.
He is around the same height as Yun Che. His face was cold; his thick, black eyebrows were like two inclined sharp swords, and his gaze was as calm as a pool of still water, without any waves of motion.
He dressed in black from head to toe being both shorter and thinner than Yun Che. Long black hair that reached his waist. Stiff and pale complexion with lifeless eyes without a hint of light. Even his aura had no life in it life he was a dead corpse.
Before the Burning Heaven Clan was exterminated Fen Juechens personality was arrogant and conceited. However he had some morals as he didn't do things that were beneath him like using Yun Che's family member as a tool to kill him or make him commit suicide.
After the Burning Heaven Clans extermination Fen Juechen became obsessed with getting revenge on Yun Che. He became very cold blooded; killing anyone that gets in his way. The only exception is Xiao Lingxi. He will listen to her no matter what and protect her with his life. She was even capable of talking Fen Juechen out of killing Yun Che. 
Fen Juechen is third young master of the Burning Heaven Clan. At some point he got into an serious argument with Fen Juebi. The two brothers fought and Fen Juechen lost. Fen Juechen was angry and ashamed and left the Burning Heaven Clan to join the Blue Wind Profound Palace. While there, he became the top ranking Inner Palace disciple. His profound strength at 17 years old was at the 2nd level of the Spirit Profound Realm.
Fen Juechen's plan was to attend the Blue Wind Ranking Tournament where he can fight against Fen Juebi to avenge his humiliation. However he was beaten up and humiliated by Yun Che before the tournament and instead returned to the Burning Heaven Clan with Yun Che as his new enemy.
He wanted to get revenge on Yun Che and went to kidnap Yun Che's grandfather and aunt from Floating Cloud City. When he first saw Xiao Lingxi he was instantly attracted to her and tried to make sure that she was not harmed while being held hostage. This resulted in him being spared when Yun Che destroyed the entire Burning Heaven Clan and killed everybody besides him. He was left with a burning rage and desire to kill Yun Che for revenge. Fen Yijue in his dying breath gave him a key that would lead him to forbidden secrets of the clan.
Fen Juechen traveled to the Black Fiend Nation to a place inn the extreme west of the Profound Sky Continent which was surrounded by dark energy all year round. It was where the secret of the key was hidden. He found a jade coffin which had the soul of the king of the Eternal Night Royal Family sealed inside of it. The soul tried to posses his body but ended up submitting to him and letting him assimilate with him and inherit his Profound Strength.
Later after Jasmine read his memories and found out that he is someone from over 1000 years ago that reincarnated, and the person he inherited his Profound Strength from was in fact his father from 1000 years ago.
Fen Juechen is being schemed against by the Sword Master of the Mighty Heavenly Sword Region and the Devil Spirit sealed within the Heavenly Sin Divine Sword so that the Devil Spirit can extract the Devil Blood inside of Fen Juechens body as to free himself from the sword in exchange he will give Xuanyuan Wentian world dominance.
After Xuanyuan Wentian's death, since his body was possessed by him, the devil's power of Yun Che was still present on him, it was so damaged that he couldn't be saved anymore.
|Recurring||Jasmine · Hong'er · Xiao Yun · Xia Yuanba|
|Harem||Xia Qingyue · Cang Yue · Huan Caiyi · Chu Yuechan · Su Ling'er · Feng Xue'er · Xiao Lingxi|
|Male||Xiao Lie · Xia Hongyi · Ling Jie · Cang Wanhe · Hua Minghai · Yun Qinghong · Yun Canghai · Mu Yubai · Number One Under Heaven · Yun Gu|
|Female||Mu Yurou · Mu Bingyun · Frozen Cloud Seven Fairies · Mu Xuanyin|
|Enemies||Fen Juecheng · Fen Juechen · Ye Xinghan · Duke Huai · Duke Ming · Xuanyuan Wentian · Feng Hengkong · Yu Luo|
|Others||Phoenix · Primordial Azure Dragon · Golden Crow · Evil God|