C487 Yang Quan's Worry

Even within the confines of a secret realm, a Training Building of this sort was exceedingly rare, necessitating a unique method to access it.

To the untrained eye, the building appeared unremarkable, so it was understandable that it went unrecognized.

Take the Martial Kings from the Timon Sect, for instance—they inspected the site but dismissed it as a mundane structure and promptly departed