The Shushan Demon Locking Tower, its construction time is no longer traceable.
The tower consists of ninety-five levels in total. According to convention, levels one to twenty-nine imprison untransformed demonic beasts, levels thirty to forty-nine imprison demons in the Transformation Realm, levels fifty to eighty-nine imprison Demon Kings in the Dong Yuan Realm, and from level ninety downward are Great Demons of the Ancestor Realm.
Of course, these rules aren't absolute.
For example, if Shushan captures a Dong Yuan Realm Demon King, it might imprison it in a cave in the sixtieth level of the Demon Locking Tower.
There, the Demon King takes a wife, bears children, reproduces and forms an entire population. Naturally, this population would contain demons of all stages, from untransformed to Transformation Realm. Thus, the only conclusion is that the sixtieth level's highest-ranking demon is that Dong Yuan Realm Demon King.
