Ancestral Building
The pocket realm was a wondrous and mysterious realm that existed in its own dimension. None of the involved powers knew of its origins, and none even had the faintest clue of the power required to make such a realm.
The only thing they knew however, was that it opened every twenty years, and inside existed treasures and opportunities most could only dream of. The pocket realm was also one of the reasons why each of the five powers were able to stand at the peak of power in this part of the Yuan Continent. In fact, the opportunities were great enough to entice even those in the Yuan Continent Holy Lands, which was why the five powers kept it a secret.
The only reason the Five Powers were unable to soar to even higher heights was due to the thin levels of Qi that existed in this part of the continent.