Black Nether was none other than the Devil Cultivator who tried to possess Duan Ru Feng's body previously. He was a powerful being from the Upper Province of the Dao Martial Saint Land.

Initially, when Duan Ling Tian obtained the Devilseal Table, a large part of Black Nether's soul was sealed inside it. He had also tried to possess Duan Ling Tian's body, but due to Duan Ling Tian's soul that was special since it did not come from this world, Black Nether's soul failed to possess his body. Moreover, Black Nether's soul was obliterated as well.

The moment Black Nether's main soul was obliterated, the soul remnant trying to take over Duan Ru Feng's body was obliterated as well. Due to this reason, Duan Ru Feng managed to regain control of his own body.

The powerful ability that Black Nether cultivated while he had control of his body had also been mastered by Duan Ru Feng.

As for the Azure Cloud Mansion, it was a sect that Black Nether had snatched over when he was occupying