Qianyuan Realm had quite a few sealing secret arts as well.
Even Wang Daoyuan possessed several rather ingenious sealing techniques.
These sealing techniques could be used to seal demons and devils that were difficult to kill, or places with unstable space like Sunset Abyss.
Of course, sealing certain things was the simplest application.
For some precious pills and spiritual medicines, ordinary preservation methods could hardly prevent their medicinal properties from dissipating.
To preserve them for a long time, one needed sealing techniques to seal them away.
However, Qianyuan Realm's sealing techniques were rather mediocre.
Being able to preserve pills and spiritual medicines for ten thousand years was already no easy feat.
With Immortal Lords and a host of True Immortals in the Immortal Realm, all kinds of inheritances were surely far more sophisticated than those of Qianyuan Realm.
Before the ascension passage had been severed, exchanges between Qianyuan Realm and the Immortal Realm had never ceased.
Quite a few members of the Golden Crow clan had ascended to the Immortal Realm. It was not impossible for Jin He to possess some sealing secret arts from the Immortal Realm.
Moreover, the energy in Phoenix Blood Crystal Stone dissipated far more slowly than that in pills and spiritual medicines.
Combined with the suitable environment deep within the lava lake, sealing it for several hundred thousand years was still possible.
With that thought, Wang Daoyuan said, "By your reasoning, it is indeed possible for Phoenix Blood Crystal Stone to retain its energy for several hundred thousand years.
"However, this Phoenix Blood Crystal Stone was left behind by Jin He more than three hundred thousand years ago.
"Its time of formation should have been far earlier still.
"Before my master cleaved open Absolute Heaven Abyss, the highest-grade spiritual vein in Qianyuan Realm was only