Demonic qi transformed into Foundation Establishment Realm demon soldiers. Those demon soldiers then evolved all the way to Earthly Immortals, after which the Demon Venerables absorbed them to strengthen themselves, striving to break the seal as soon as possible.
Each time the Demon-Sealing Land opened, it was partly to gather resources and partly to inspect the seal and reduce the number of those Earthly Immortal-level Great Demons.
The entire Demon-Sealing Land was an enormous seal, laid down by three figures at the level of Holy Lords from the three great sacred lands, at the cost of countless resources from the entire Purple Cloud Star System.
A grand formation capable of suppressing a True Immortal was naturally no low-grade thing.
There were far too many factors involved. If they had any other choice, the three great sacred lands would not have wanted to go through so much trouble—they would have simply slain that Demon Venerable and been done with it.
But helplessly, they could not kill it. They could only seal it.
Thus, over the long years, things had taken their present form: taking what they needed on one hand, while checking whether the seal remained sound on the other.
Because of this seal, the three great sacred lands lost many elite disciples every time.
Ordinary Earthly Immortal cultivators entering it would only be delivering themselves onto the chopping block.
Thus, there was no other way.
"So complicated. What a pity the Purple Cloud Star System has no Grand Unity Mysterious Immortal. Otherwise, it could be settled once and for all."
"Heh, a Grand Unity Mysterious Immortal would not bother with something so tedious. In the eyes of someone at that level, a single thought would be enough to wipe out the entire Purple Cloud Star System."
Liu Bai sneered disdainfully.