After passing on the Fa, Xu Changqing did not let Du Chengen continue to stay here, but let him directly cast a spell and leave Xinglong Prison, anyway, because he had his own forbidden punishment seal in his body, his mana was not imprisoned by Xinglong Prison. As for whether his sudden departure would arouse the suspicion of others, this was not something Xu Changqing was worried about, after all, even the prison master would not be interested in pursuing some things that even he didn't know the depths of, there were many things that the more he knew, the faster he would die.

Xu Changqing didn't leave for the time being, he still needed to go to the location of the netherworld fragment to take a look, although he would not take this netherworld fragment away now and destroy the power of Xinglong Prison, but the remnant soul in the netherworld fragment was the goal of his trip. There are not too many past memories in the remnant soul clone of the Diting Divine Beast that he refined just now, and these memories are all memories of the Kunlun Wonderland, such as his current doppelganger, the ancient desolate beast Zhu Yan, who was indeed with this netherworld fragment when he was a child, and so on. As for other memories of the underworld in ancient times, there is no one, and these memories are valued by Xu Changqing, although the shattering of the ancient underworld is the last round of heaven and earth tribulation, but it is inextricably linked with the heaven and earth tribulation that he is going to experience now, if he can understand the details of the shattering of the ancient underworld, he may be able to find out something beneficial to his own tribulation.

The unknown fragment of the underworld is located in the middle of the Xinglong Mound, buried deep underground, and was later inadvertently excavated by the prisoners of the Xinglong Prison, thus causing the isolated Yin Death Qi to emanate and envelop the entire Xinglong Mound.

After Du Chengen was rescued, the main thing Xu Changqing had done here, but he was not in a hurry to go to the location of the fragments of the underworld, but the prisoners on the side of the Xinglong Prison Battle Demon Cliff who were not in a hurry took a closer look at the various methods engraved on the stone wall. Although these Dao methods are not in the flow for him who has mastered all kinds of ancient immortal methods and Dao methods, these methods are numerous, covering all kinds of Dao methods in the Kunlun Three Realms, and can almost be called the complete set of the Dao methods of building the foundation of the Kunlun Three Realms.

Soon, the Dao method engraved on both sides of the stone wall had already been read by Xu Changqing, and he also came to the middle of Xinglong Prison, that is, the boundary between Xinglong Prison in the Immortal Palace and Xinglong Prison in Battle Demon Cliff. There are no barriers such as walls to block the movement of the two sides, but both sides will consciously vacate this area, and the jailers of both sides will not enter this place, and only those prisoners who are determined to die will gather here to die. Because this is where the fragments of the underworld are located, it is also the core of the power of the entire Xinglong Prison, and the effect of the forbidden punishment monster wind born from here is more than ten times stronger than that of other places, and the consumption of the prisoner's body and soul is also much faster, and staying here is naturally faster than staying in other places, and it has gradually become a small prisoner cemetery, after entering here, you can see some scattered prisoner bones everywhere, and you can also see some tombstones, and you can know a little from the epitaph the identity and experience of the person who carved the monument.

Xu Changqing walked to a cave where the fragments of the underworld were located, this cave was much larger than the other caves in Xinglong Prison, and it was also much longer until it was a hundred meters underground before reaching the end. At the end of the cave, through a stone wall that has been artificially hewn, you can see a huge karst cave shrouded in a hundred times stronger than the outside world to the yin dead air, the rocks around the cave are all infiltrated by the yin dead air, forming a kind of cold stone, and the cave is a backwater pool formed by the condensation of the yin dead air.

I don't know if it took tens of thousands of years for such a pool of water to be condensed by the supreme yin dead qi, even if the strongest immortal gets a drop, I am afraid that it will be frozen in the body and soul. With Xu Changqing's current body, he can't resist this pool of stagnant water, but for Xu Changqing, he doesn't need to touch this pool of stagnant water, he has a way to collect it.

I saw that Xu Changqing drew out the power of the laws of the underworld from the Qiankun world, forcibly opened a two-realm passage above his head, and then a strong suction force came out from the hollow-like passage, and this pool of Zhiyin stagnant water weighing thousands of jun turned into a water dragon and rushed into the passage, turning into a part of the underworld of the Qiankun world.

Although the stagnant water condensed by this supreme yin death qi is only a drop in the bucket for the underworld of the entire Qiankun world, this supreme yin death qi comes from the ancient underworld, which contains a large number of heaven and earth laws of the ancient underworld. Xu Changqing can't peek into these laws of heaven and earth, but the Qiankun world can parse them out and integrate them into his own laws of the underworld, completing the connection and fusion of the ancient and the newborn underworld. Just when the fusion of the fundamental power of the old and the new underworld was completed, green clouds appeared in the underworld of the Qiankun world, and a light rain fell, which moistened the desert land of the underworld after falling on the ground, and the young saplings also slowly grew out of the ground, gradually adding a bit of vitality to this lifeless underworld. Perhaps feeling the changes brought about by this rain, the Lord of the Netherworld couldn't help but raise his head and let out a long howl, which was full of joy, and under the stimulation of this long howl, the ten thousand ghosts that had been condensed in the underworld also shouted together. I don't know if it's because of the perfection of the Heavenly Dao in the Netherworld, or because this cry is too poignant, a small number of innate gods who were still asleep gradually woke up, and instantly accepted the knowledge of the formation of the will of heaven and earth, so that they understood their duties and abilities, and began to spontaneously restrain their vitality in the Qiankun world, exude dead qi, connect the power of reincarnation, improve the reincarnation of heaven and earth, and make all things in the Qiankun world enter the way of life and death. ,

Seeing that just a pool of stagnant water from the Yin Dynasty had been sucked into the Qiankun World, and there had been such a big change, Xu Changqing couldn't help but wonder if if he could make the Heaven and Earth Dao of the Qiankun Netherworld complete if he immediately integrated the ancient netherworld fragment at the bottom of the pool into the Qiankun World. But he is just thinking about it, he knows very well that the changes in the Qiankun Netherworld have reached a limit, and if he adds fuel to the fire, it will be a bit too much, not to mention that those Xinglong Prison prisoners who will affect the overall situation of the Battle Demon Cliff are also some troubles, and he will not take this fragment away until other things are resolved.

After a pool of stagnant water was absorbed, a large pit was revealed on the floor of the cave, and in the center of the pit was the fragment of the ancient underworld. Although because of the disappearance of such a pool of Yin Dead Water, the surrounding Yin Dead Qi has faded a lot, but because this ancient Netherworld fragment still exists, it will not affect the Yin Dead Qi of the Xinglong Dharma Tomb in the outside world. The appearance of that fragment of the ancient underworld was really ordinary, no different from some of the other stones in the Xinglong Prison, and even its surface did not even have the Yin Death Qi, as if the source of the Yin Death Qi did not come from it. It's just that if you use the method of the Huangquan Ghost Dao to push your mind to feel it carefully, you will find that a strange yin qi that is faint to the extreme emanates from this stone, and this yin qi will gradually change into yin death qi after leaving the stone for a certain distance, and the whole process is silent.

Xu Changqing walked in front of the fragment of the ancient underworld, squatted down, put his hand on it, and used the method of connection to borrow the mana of the Dizang Sutra Shilun of the Master of the Dizang in the Qiankun Netherworld, and leaned into the fragment.

Although there is a difference in the power of the underworld of the two worlds, after all, it is the same source of power, and there is no obstacle when the mana penetrates into the fragments of the ancient underworld, and the mana of the Dizang Sutra is directly attracted by the mana of the Dijing Divine Beast Remnant Soul, and soon found the Diting Divine Beast Remnant Soul body located in the center of the fragment.

For Xu Changqing's investigation, the remnant soul body of the Diting Divine Beast did not react at all, and the loss of the remnant soul clone greatly depleted the vitality it had accumulated over the years, and it had to go into a deep sleep, borrowing its instinct to continue to collect power. The mana of the Dizang Sutra World Wheel penetrated into the remnant soul of the Diting Divine Beast lightly, searching for the past memories in the remnant soul, the whole process was very slow and meticulous, fortunately, the remnant soul of Diting fell into a deep sleep, otherwise Xu Changqing would have to spend some hands and feet to be able to do this.

"What a strange memory!" The memories of the remnant soul of the Divine Beast kept flashing in front of him like the Western movies and paintings that Xu Changqing had seen, allowing him to feel the experience of the remnant soul of the Divine Beast as a bystander. After listening to the memory of the remnant soul of the divine beast falling to the Kunlun Three Realms with the fragments of the underworld, Xu Changqing had already obtained it from the remnant soul split, and there was nothing peculiar about that memory, it was more of a lonely feeling.

And continue to push forward, the broken memory of the ancient underworld is blank, Xu Changqing can only feel that he seems to have entered an absolutely dark environment, and in this environment, all he can feel is fear, an extreme fear that he has never felt before.

Before Xu Changqing could understand what was going on, a light flashed in the darkness, rushing towards Xu Changqing's mana, and rushing into Xu Changqing's divine soul along the mana, forming a ruined consciousness that directly acted on his divine soul. With Xu Changqing's current doppelganger Divine Soul realm, he had no power to resist, and the whole person only felt that he had been split into pieces, and there was only one dead word in his mind.

"Poof!" After Xu Changqing came back to his senses, he only felt a splitting headache, his soul was distracted, and Zhu Yan's body was even substantially injured, and a mouthful of natal golden blood couldn't help but surge up and spray on the fragments of the ancient underworld in front of him. This was the first time Xu Changqing had been hurt like this, almost killing him, and at the same time, his soul was also greatly traumatized. It's just that these injuries are nothing to him.

"That Great Destruction Sword Momentum Sword Intent that Shatters the Ancient Netherworld alone can have such a powerful power, my Great Destruction Sword Momentum is simply a child's thing!" Xu Changqing, who was pale, wiped the blood from the corner of his mouth, and instead showed an excited smile on his face, and said quite self-deprecatingly.