The entire Dream Dynasty is filled with "dead souls."
Although the number might not compare with the billions of living beings in the Blue Lake, the quality is unparalleled.
Having remnants of power is the bare minimum requirement to enter, so everyone inside is a Zenith-level master or above. These undead have been imprisoned for endless ages—could the Evil Qi inside not be substantial?
As for how it could be opened,
The Shen Dragon did not explain.
Liang Qu could only half-guess. Most likely, during an encounter in the past, the Shen Dragon had secretly left behind a "hidden entryway" using the unique traits of the Shen Clan.
Whether it would ever be useful or how it might be used, for now, it remained a potential card to play.
False genius: Laying down an elaborate decision-making chain, planning for decades or even centuries ahead, preparing every contingency, and always staying in control.
