According to historical records.
Ten thousand years ago, there was an unprecedented war between immortals.
In that battle.
A region in the Void Land, even larger than the entire Prosperous Land combined, was reduced to a vacuum. Due to the terrifying residual energy, even spiritual energy could not flow into it.
But unfortunately, it seemed no one knew the outcome of that battle.
It was not until about a thousand years after that great war.
That the truth, whispered among truly top-tier Mahayana cultivators, began to surface.
And when countless cultivators on the continent heard.
That a cultivator named Su Tianhao, long ago, was killed by three legendary immortals after breaking through to the immortal realm.
And about the various schemes the three immortals had laid to prevent others from reaching the immortal realm, all the cultivators on the continent were somewhat aghast.
At first, many did not believe it.
But until the third millennium after the great war, a cultivator at the peak of Mahayana successfully broke through to the immortal realm live in the Void Land.
From that newly ascended immortal, they received confirmation, and more people finally believed that the immortals who had ruled the Upper Realm for who knew how many years were actually so terrifying.
There were also some bolder cultivators who, while the new immortal was breaking through, had asked about the specific outcome of that battle.
However, the immortal shook his head.
He remained tight-lipped.
But in reality, cultivators who had truly reached a certain level of power all understood.
What exactly happened in that battle.
They faintly recalled that day, watching from afar.
After that being unleashed his final punch, the figures of the three immortals had completely vanished.
The once immensely powerful Cangyun Heavenly Dao also seemed to emit fearful cries that only they, the top cultivators, could perceive.
"I'll leave this world to you. Don't bother me if nothing's up."
This seemed to be the last thing that being said, and it sounded as if he said it while yawning.
And after this new immortal successfully ascended.
The cultivators of the Prosperous Land were all very afraid that this new immortal would also try to implement realm blockades like the old immortals.
But fortunately, that immortal did not do so.
After truly stepping into the immortal realm, he immediately took over the authority of the Plane Lord of the Upper Realm.
Originally, the Cangyun Heavenly Dao was unwilling, but in its severely wounded and terrified state, having lost three Plane Lords, it could only agree.
Subsequently, the immortal who became the Plane Lord of the Upper Realm began to impart his understanding of the immortal realm to cultivators who had not yet reached it.
Under these circumstances.
Within a hundred thousand years, many cultivators who should have been buried by obscurity truly stepped into the immortal realm beyond Mahayana.
Along with this, with the emergence of so many experts, the spiritual energy density of the entire Void Land, including its remote areas, increased significantly.
The Prosperous Land even reached a state of true peak prosperity.
Everyone believed that the Prosperous Land had reached its true apex, a state that could never be surpassed in the past or future.
But in reality, all cultivators who had reached the immortal realm understood.
The Prosperous Land, or the Upper Realm, was never the peak.
Because many cultivators who had reached the immortal realm had glimpsed, or heard of.
In fact, in a seemingly inconspicuous and remote part of the Void Land.
There lay an Upper Realm even more terrifying than the Cangyun Realm.
According to some old immortals who had survived since the era of the three immortals.
The strongest in that mysterious world was apparently the one who truly ended the dark rule of the three immortals.
Some immortals had heard this legend and wanted to explore it, to meet that strongest being.
But unfortunately.
Some might not have even found that place.
Some might have found it, but upon finding it, no matter how they shouted or pleaded, there was no response from within that terrifying world.
Of course, only a small number of powerful individuals were qualified to have the opportunity to truly enter it.
And as those powerhouses returned, they all wore expressions of longing, but rarely spoke of what happened inside.
And without exception, the strength of those returning powerhouses would increase at a terrifying speed, clearly having benefited greatly from that other world.
This phenomenon even led to the admiration of a large group of immortal cultivators, who sought that small world.
But unfortunately, as time went by, news of that world became increasingly scarce.
Even extending the timescale further.
The legend of this small world became somewhat elusive even among the community of immortal realm cultivators.
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