This middle-aged cultivator in a Taiji Diagram robe was none other than the founding patriarch of the Heavenly Secret Sect, the Yin-Yang Divine Venerable.
In the real world, he had already broken through to become a Formation Immortal.
Back when they had plotted against the Devil Race in the Absolute Heaven Abyss, the commotion had been far too great and had drawn over his projection.
At that time, he had already been a white-haired old man.
But the current Yin-Yang Formation Immortal still looked middle-aged.
For a moment, Wang Daoyuan had actually failed to recognize him.
The other Earth Immortals and Great Powers also echoed the Five Thunders Divine Venerable. Demon Suppressing City was a formidable war machine.
The city contained countless folded spaces and could house millions of cultivators. It could also stabilize the surrounding space.
Every corner of Demon Suppressing City was covered in countless formations.
Even if Demon Gods launched a full-scale assault, they would be unable to damage Demon Suppressing City.
Such formidable functions naturally meant that it consumed an ocean of spiritual power.
Beneath Demon Suppressing City lay a gigantic peak seventh-rank deep spiritual vein, its main body hidden thousands of zhang underground.
The Devil Race found it difficult to destroy.
Only near Demon Suppressing City did it extend upward, close to the surface. Only by setting formations or building a city there could one easily connect to the earth vein.
If a city were built elsewhere, even connecting it to a spiritual vein would be difficult.
Moreover, this spiritual vein was a branch of Ancestral Dragon Mountain and could provide spiritual power without end.
Demon Suppressing City had not been built here on a whim. After weighing many considerations, they had chosen this uniquely blessed location.
Ascension Valley also had a large spiritual vein,