Cang Ming

Cang Ming is the main antagonist. He's the twin soul of Qianbei Ye (2 souls in one body). After Qianbei Ye fell in love with Gu Ruoyun, he decided to separate Cang Ming from his body causing his cultivation to drop from Full Circle.

He always tried to take Ancient Divine Pagoda from Gu Ruoyun, until he killed her which caused a misunderstanding between Qianbei Ye and Zixie.

Later Qianbei Ye tried to kill him, which he was unable to accomplish only sealing him.