The ghosts and immortals who ran this world in ancient times. The reason why this space can be gradually changed from the original mustard stone and the empty and empty appearance of the mustard seed space, and it has been deduced and operated into the appearance of the extremely rich yin aura today. Evolved into such a space, suitable for the survival of yin spirits and ghosts.

The key to this is that these ancient ghosts and immortals not only detained a large amount of Yin Spiritual Qi from the outside world into this space, and discharged the heaven and earth breath of other attributes that were originally left in this space, but also refined this mustard stone on the earth's leylines.

This originally empty space, so there was immediately a piece of land. Opposite to the earth, there is only the void where the yin aura is fluttering and circulating.

In ancient times, these ghosts and immortals who had advanced to the gods and obtained the rank of immortals, except for the rules of the yin spirit rotation that the ghosts themselves could understand. Obviously, on the basis of comprehending the rules of the Yin Spirit Circulation, he has begun to comprehend the rules of space.

It was only after these ancient ghosts and immortals understood the rules of space that they had the ability to operate and transform this space. And the essence of this kind of operation and transformation of this space is to refine the trace of space laws circulating in this mustard seed space with the laws of the Yin Spirit Rotation in heaven and earth that these ghosts and immortals in the Transformation Stage originally comprehended!

Only in this way will the Yin Spirit Qi in this piece of heaven and earth be so natural and uniform, as regular as a circle. If this is not the case, in this space of heaven and earth, the massive amount of yin aura that has been restrained and collected by the ancient ghosts and immortals from the outside world will easily appear that kind of situation of a hammer in the east and a stick in the west, which is particularly rich in some places, and sparse in others.

If this is the case, there will be no large number of strange creatures and plants left in this heaven and earth. Those ghostly creatures will not survive so freely in this space. The water cycle between heaven and earth will not be constructed. And between this heaven and earth, there will not be a blazing red halo of underground magma every three days, and the blazing red halo of this underground magma is only reflected from the underground through the power of space, rather than really touching this mustard seed space.

This difficulty is far higher than the concentration of yin aura in this space. Only in this way will this world not be completely cold. In this heaven and earth, all kinds of substances, energy, aura, and the details of the cycle between life and death have been mostly thought of by the ghosts and immortals of the god transformation stage who ran this world in ancient times.

And used various means to build a huge system of non-stop circulation and endless circulation. In the circulation of this system, the flow of yin and spiritual energy between heaven and earth is natural and changes in all directions.

However, the more sophisticated and complex the system, the more something like a CPU is needed. This large and well-thought-out system is regulated. Otherwise, the errors caused by the operation of the system, once accumulated to a certain number, will affect the operation of the entire system. And in this way, it leads to the collapse of the entire system, that is, the entire heaven and earth space.

This is just like the high-precision machine tools in the human industrial system in today's world. Even if the same type of material, the same type of screw, and the same type of parts are put together, the machine tool created has a world of difference in precision.

The reason for this is that these high-precision machine tools are very strict about the details. Whether it is from the choice of materials, or from the order of assembly. In order to remove the stress as much as possible, even the sequence and technique of screwing are also exquisite. If a detail is not paid attention to, it will lead to the precision of the machine that is completely substandard.

This space, this world, is a system far more complex and sophisticated than the instruments and machine tools in the human world. And the Yin and Yang Afterlife Array in the Immortal Pavilion of the Ghost City of Fengdu is such an extremely sophisticated system, as a central processing unit and the like. What to do is to reconcile yin and yang, check and fill in the gaps. It can be regarded as the key point of this world.

Therefore, if it weren't for the people of the later generations, they would never be allowed to enter this immortal pavilion and come into contact with this Yin and Yang Rebirth Array. That is, the Ghost King was lucky enough to master the method of entering and exiting this space, and only then did he master the magic weapon of entering this immortal pavilion and the Yin and Yang Afterlife Great Array.

Therefore, the Ghost King Zhukong Xiang borrowed this Yin and Yang Afterlife Great Array to attract the majestic and vast Yin Aura between heaven and earth, although it conformed to the rules of the Yin Spiritual Aura in this space. However, while it triggered the majestic convergence of the Yin Spiritual Qi in this heaven and earth, it also triggered the law of the Yin Spirit Circulation, and it also triggered the Law of Space that was refined by the ancient ghosts and immortals and merged with the Law of the Yin Spirit Circulation!

Therefore, the cloud and thunder urged the wooden ghost face, and the huge and incomparable Yin Spiritual Qi Cyclone that he was facing had to deal with more than just the rich Yin Spiritual Qi that had gathered between this heaven and earth. Rather, it is the law of Yin Aura contained in these Yin Aura. In other words, what Yun Lei has to deal with is the power of this entire space, the entire heaven and earth!

And the thunder and lightning spirit power contained in the wooden ghost face that was leveraged by the cloud thunder and thunder used as a lever to pry it up, and the strength released was definitely not the strength of the cultivation of the Dan stage! The law of the thunder and lightning power was clear and strong, and in the golden light, the thunder and lightning spiritual power released from the wooden ghost face was like the thunder and lightning spiritual power at the energy level of the god transformation stage.

Yun Lei raised his head with a wooden ghost face, but saw the wind and clouds surging around him. Rolling towards him. It seems that the next moment will overturn it. but in his heart he was neither sad nor happy, neither shocked nor angry. And the golden light that flickered on the wooden ghost's face just flashed, and then it bloomed in all directions.

In an instant, these yin clouds that fell from the sky, and the edges of the Yin Spirit Vortex used from all around, were inlaid with a trace of golden light. As for how these golden lights were inlaid, Yun Lei didn't know at all. The thunder and lightning spiritual power of the god transformation period seems to be able to make this thunder and lightning spiritual power cross the space in a moment.

And this trace of golden light, after being embedded in this huge cyclone and the cloudy clouds, is like a steel knife that cuts into the flesh. Knife by knife in this piece of heaven and earth, cut through the accumulated clouds, and the huge cyclone!

Then, this trace of golden light suddenly turned into a thunderbolt as thick as a water tank, winding like a dragon, and spanning the heavens and the earth. All of a sudden, the rumbling sound between heaven and earth rose again, and thunder crossed the sky, blooming and intertwining, like dragons that meandered through the nine heavens, but were fleeting.