Illusion Realm Mountain. It's a secret realm located within Sky Heart Hall.
The reason it's situated in Sky Heart Hall, and not Tiangong Palace or the Martial Arts Palace...
Is because Illusion Realm Mountain was initially planned for those geniuses and elites in the army who were on the verge of stepping into the Divine Passage Realm!
If a leak happened, the enemies might deduce whether a certain powerhouse was at the threshold of a breakthrough based on the number of levels in Illusion Realm Mountain. This is extremely crucial information.
If such a master on the verge of the breakthrough was targeted for assassination, the loss would be much greater compared to those who have not yet begun the breakthrough of the Yin and Yang Souls.
If there are any malicious persons in other areas of Ten Thousand Peaks City who might leak information, the possibility of such leakage from this secret realm within Sky Heart Hall is incredibly low.
