“It’s empty inside!”

Caiying looked down and shouted loudly.

Sure enough, this place is indeed a fortress, which looks like a weakened version of Anding City.

The dark iron is obviously much more valuable than the fire and red copper.

There are also many mechanisms, but Zhou Shu doesn't want to find them and test them. There is no need, and destructive excavation is more convenient.

It’s not the heavens, so I can’t take them back.

Caiying realized something, "It was indeed made by the Immortal Court, right?"

"I can't be sure, go and have a look."

Zhou Shu fell, "There is no one inside, but you can't relax."

The space in the fortress is very large and empty, and a formation occupies about 80% of the internal space.

It is certainly a formation, with tens of thousands of copper pillars engraved with runes thousands of feet high, with power flowing in the middle, and the runes still flashing from time to time, and are still working.

Dozens of rooms were divided into the side of the formation, and a pipe of dozens of miles thick was connected on the other side. Looking at the direction, it should lead to the right half of the fortress.

Caiying waited for a while, "Zhou, what did you see?"

Zhou Shu said calmly, "The material of the copper pillar is Jingming bronze, which is a specialty of Jingmingtian, one of the thirty-three days. It is very excellent array material, which is almost compatible with all formations. It is not limited to a certain law. It has been used in Anding City. Our Xianshu City teleportation array has also been used. The power core of the formation is various magic crystals. Each copper pillar has at least one hundred magic crystals of different sizes. Under the center array eye, there are more than three hundred green magic crystals of good material. The largest green magic crystal may be from the Demon Lord or even the Demon Lord."

"I don't understand..."

Caiying was stunned for a moment, "The material of thirty-three days, the power source of the demon world... what is the formation?"

"I have never seen the formation before, but it is a bit similar to the formation in Anding City."

Zhou Shu pondered, "The material used is probably gray fog, which should be a certain formation that converts or creates chaotic power."

Caiying was a little confused, "Ah?"

Zhou Shu said slowly, "Simply put, this is a secret base for a certain force to study the power of chaos. Judging from the loss of the green magic crystal and the copper pillar, it has lasted for at least 20,000 to 30,000 years and was built after Anding City."

"oh."

Caiying was puzzled and angry, "Who is that? Just study it carefully, why should I use Xuanhuang Realm as an experimental product?"

"It seems that those strange winds are derived from the leakage of the formation power, not intentional. It seems that no one has been maintaining these formations for a long time, so it is normal for problems to occur," Zhou Shu paused and shook his head, "But if the leaked power caused the strange wind, why did it deliberately blow around the Xuanhuang Realm? Is someone deliberately guiding the strange wind or even deliberately causing the leakage?"

I thought I could find the answer by finding it here, but not, and there were more new doubts.

Caiying said seriously, "We are waiting here. If someone is there, they can always pull people out."

Zhou Shu nodded, "You can try it."

Just as I was watching the bronze pillar think, a strange whistle suddenly sounded.

Within a few breaths, the sound became louder and louder.

Caiying pointed at the high platform in the middle of the copper pillar in surprise, which was where the array eye was, "Zhou, it came from there!"

Before he finished speaking, tens of thousands of copper pillars suddenly lit up together, and the whole hall suddenly became like daytime. The ancient runes flashed back and forth like stars, and there was no pattern. I just felt messy and the sound became louder and louder. The platform began to vibrate, and the entire fortress trembled. After a few breaths, the platform became extremely hot, like burning red charcoal.

Bang!

A red light flashed, and a shock wave condensed like a substance rushed straight into the pipeline.

Bang, bang, he vaguely bumped into the pipe several times, changed directions, and disappeared immediately.

"ah?"

Caiying was still stunned, but Zhou Shu had already flew out.

On the right half of the fortress, shock waves rushed out, breaking through the rich gray fog. It wrapped in a large cloud of gray fog and several unknown fog demons rushed into the void at the edge of the heavens and disappeared quickly.

"Caiying, come quickly."

Zhou Shu immediately followed.

Caiying also turned into a sword light, following closely behind.

“This is very fast.”

"It's already slow, if I didn't hit those few times."

Zhou Shu has already started to calculate and deduce, and he wants to determine the impact of those impacts on the shock wave.

After following for five days, Zhou Shu stopped and Caiying said suspiciously, "Why don't you follow me?"

“No need.”

Zhou Shu shook his head. The shock wave had formed the prototype of the strange wind. If it continued, the previous strange wind would be reproduced. The process was the same and the trajectory of the flow was the same. According to the data from these five days, he had deduced it thousands of times, and each time it was the same result, and there would be no mistakes.

Obviously, it was those impacts that changed the direction of the shock wave, which caused the strange wind to rush toward the Xuanhuang Realm.

It is not difficult to solve this problem. There are many ways to solve it, but the key to the problem is not here.

Caiying nodded, "I don't understand, but you're right. Let's go to Xuanyi Realm?"

He paused, "No, let's go back to the fort."

Caiying said in confusion, "Let's go back now? We don't care about that strange wind. It seems that there is a fog demon inside?"

Zhou Shu shook his head, "Those fog demons don't matter. They just test the Xuan Realm. There is no big problem. We will solve it when we return to Xuan Huang Realm."

Caiying responded and followed Zhou Shu again.

After going back and forth, she didn't feel tired, and just wanted to find the murderer who persecuted Xuanhuang Realm as soon as possible to vent her anger.

Back at the fortress, explored around for a while, but there was still no one. Bypassing the still-moving formation, Zhou Shu walked to the huge passage.

There was a gray fog coming from there, but it was not much restrained by the power in the formation.

As expected, this is the key to the fortress. It is made of dark iron, much higher than Fire Crimson Copper. The passage is about 300 miles long and has a thickness of several miles, which is comparable to Anding City. There are a total of twenty-seven levels of formations in the middle of the passage, layer by layer. Obviously, these formations are used to block the gray fog and fog demons on the opposite side, but now these formations are only left with wreckage, which has long been damaged.

The damage to the array talisman may be the leaked shock wave, or the fog demon and gray fog on the opposite side.

After passing through the pipeline, the right half of the fortress was even more empty, without any buildings. In the gray fog, there are many array plates that have been destroyed by gray fog. A very simple array plate is to release the vitality of the immortal material and use it to attract the fog demons. No one has maintained or supplemented it for a long time, and the array plate has failed. However, there were many fog demons that were attracted before, and the gray fog was rich, which has formed a small group of fog demons.

If it weren't for the vitality of the breath, I'd be afraid that a bunch of people would soon pounce on me.

Seeing this, Zhou Shu seemed to have some enlightenment.

It's basically certain.

This fortress is the base used to study gray fog and chaotic power. On one side is the formation and on the other side is gray fog. Open the pipe in the middle and lure the gray fog and fog demons to study, and close it when it is not needed.

Which force has such an idea that it actually ran to the edge of the heavens to study the gray fog, and why did it give up and ignore it halfway through the research? Isn’t it necessary to build this hard-earned fortress?
Chapter completed!