C150 unfettered dwelling

The Celestial Realm was the mortal world's name for the upper realms. However, many cultivators that ascended to the upper realms would accidentally discover that the Celestial Realm was only a region of the upper realms!

The Immortal Realm was the generic name for the lower realm and the upper realm. In fact, it should be called Immortal, Devil, Demon and Buddha Realms