Boom!
The stone mechanism slowly closed, then was sealed by a mass of yin energy.
Yu Jing could no longer sense any aura emanating from Bi Dongshan, and his connection with his secondary personality had also weakened to a minimum.
"What dense yin energy! I thought the yin energy in the underground mausoleum earlier was already thick enough. For every hundred meters this enormous abyss descends, the concentration of yin energy increases by ten percent... What are those things on the walls?"
With a massive amount of yin energy covering the walls of the huge cavern, it was impossible to see what they were from a distance.
As Yu Jing flew downward, he gradually approached the wall and examined it carefully.
Who would have thought that the seemingly rough wall from afar was actually densely embedded with skulls? This enormous abyss descended ten thousand meters, and the number of skulls could be counted in the hundreds of millions.
"Where did so many dead people come from?"
Following Dean Wuxin, Yu Jing eventually landed at the very bottom of the cavernous abyss—a hidden underground garden.
A very unusual coffin stood in the center.
The coffin had been made from the most primitive stone. Pictographic characters and ancient patterns were engraved on it, and it could basically be inferred that the person sleeping inside was some 'great figure' from the ancient Old World.
At least three layers of high-level restrictions had been placed on the coffin's surface, preventing Yu Jing from seeing what was inside.
Dean Wuxin stood atop the coffin with his hands behind his back. Gazing at the countless skulls around the enormous cavern, he said loudly:
"Surprised, aren't you? Why are so many dead people hidden here? This 'Natural Yin Domain' created by humans is the first I've ever