Reincarnation Mountain is unspeakably mysterious. To call it an out-of-domain artifact is not entirely accurate.
First of all, it is a place of inheritance. Successive Patriarchs of the Xiaoyao Sect of the Deity Transformation realm all chose to go into seclusion here to decipher the inheritance.
Reincarnation Mountain possesses three barriers, meaning it contains three inner minor worlds. Past Patriarchs of the Xiaoyao Sect were relatively mediocre in talent, at best managing to shatter the first barrier and enter the first minor world. As for the subsequent two minor worlds, they had always remained a mystery.
Chapter 1013