"Tomb of the Setting Sun!"
This is the common name given by both the Human and Demon Races for this boundary land!
It is said that in ancient times, the sky of the spirit realm did not have seven suns, but nine. However, when both the Human and Demon Races first arrived in the spirit realm, a True Spirit battle erupted, sweeping across most of the realm's races!
Hundreds of beings with cultivation comparable to True Immortals suddenly engaged in fierce battles across the spirit realm for reasons unknown.
As a result, not only did eighty to ninety percent of them perish in this terrifying upheaval, but dramatic changes occurred across many regions with mountains and seas shifted, land cracked open, and even two of the high-altitude suns were damaged and destroyed.
This boundary land is said to have formed from the fall of one of those suns, creating a massive basin.
