In the void, a mass of black vapor first rolled into existence out of nowhere. Then, as it churned, it rapidly expanded. Within a few breaths, the roiling black vapor had spread across a thousand meters.
After expanding to a thousand meters across, the rolling black vapor took on a thread of blood-red. Gradually, as that churning mass expanded further and further, it grew so vast that its edges could no longer be seen with the naked eye.
Its extent was absolutely no less than tens of thousands of miles.
The churning mass continued expanding for a full quarter-hour. Once it had completely turned into dense, dark-red, blood-colored demonic energy, the phantom of a palace suddenly appeared within that blood-red demonic energy, flickering in and out of sight.
At that very instant, the blood-red demonic energy ceased its eruptive churning.
Yet at that same instant, the shrunken Demon Soul Hall hanging from Ye Zhen's chest, reduced tens of thousands of times in size, suddenly turned scorching hot.
The heat was so intense that Ye Zhen groaned aloud in pain.
After that pained groan, Ye Zhen immediately realized something. Instinctively, Ye Zhen's Spiritual Sense sank into the Demon Soul Hall hanging before his chest.
Within the Demon Soul Hall, which had remained dormant all this time, a thick layer of blood-colored demonic energy had unexpectedly spread. In particular, the Demonic Spirit Ghosts Ye Zhen had sealed inside one of its great halls were roaring one after another, exceptionally active.
What surprised Ye Zhen even more was that the Battle Soul Blood Banner in the central hall of the Demon Soul Hall was also emitting a brilliant blood-colored radiance, flashing on and off as though responding to something.
When Ye Zhen's Spiritual Sense entered the Battle Soul Blood Banner, an indescribable sensation