Chapter 4069 Fortress

"It's empty inside!"

Caiying looked down and shouted loudly.

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

Dark Gang Iron is obviously much more valuable than Fire Scarlet Copper.

There are also many mechanisms, but Zhou Shu doesn't want to go and test them. It's not necessary. Destructive digging is more convenient.

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

Caiying realized something, "Sure enough, it was Xianting who did it, right?"

"Not sure, let's go down and have a look."

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

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

It must be a formation. There are tens of thousands of copper pillars engraved with runes that are thousands of feet high. Power is flowing in the middle. The runes are still flashing from time to time, and they are still working.

Dozens of rooms are separated from one side of the formation, and the other side is connected to a pipe with a thickness of tens of miles. 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 copper, which is a specialty of Jingming, one of the thirty-three heavens. It is an excellent formation material and is compatible with almost all formations. It is not limited to a certain law. It can stabilize the city." It has been used, and it is also used in our teleportation array in Xianshu City. The power core of the array is various magic crystals. There are at least a hundred magic crystals of different sizes under each copper pillar, and the array eye in the center Below, there are more than 300 blue magic crystals of very good quality, and the largest one may belong to the Demon Lord or even the Demon Lord."

"I don't understand..."

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

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

Zhou Shu pondered, "It should be some kind of formation that converts or creates the power of chaos. The material used is probably gray mist."

Caiying was a little confused, "Huh?"

Zhou Shu said slowly, "To put it simply, this is a secret base for a certain force to study the power of chaos. Judging from the wear and tear of the green magic crystal and copper pillars, it has lasted for at least 20,000 to 30,000 years, and was built after the city of stability. "

"oh."

Caiying was puzzled and angry, "Who is that? Just study it carefully. Why use the Xuanhuang Realm as a test subject?"

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

I thought I would find the answer when I found this place, but no, I got new doubts instead.

Caiying said seriously, "We are waiting here. If there is someone, we can always find them."

Zhou Shu nodded, "You can try it."

Just as he was looking at the copper pillar and thinking, a strange whistling sound suddenly sounded.

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

Caiying pointed to the high platform in the middle of the copper pillars in surprise, where the formation's eye was, "Zhou, it came from there!"

Before he finished speaking, tens of thousands of copper pillars suddenly lit up together, and the entire hall suddenly seemed like daylight. Those ancient runes flashed back and forth like stars. No pattern could be seen. They were just chaotic and the sound became louder and louder. , the high platform began to shake, and the entire fortress trembled. After a few breaths, the high platform became extremely hot, like red-hot charcoal.

Bang!

There was a flash of red light, and a solid shock wave rushed straight into the pipe.

Bang, bang, it hit the pipe several times, changed direction, and then disappeared.

"ah?"

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

On the right side of the fortress, the shock wave shot straight out, breaking through the thick gray fog. It carried a large cloud of gray fog and a few unknown fog demons, rushing into the void at the edge of the heavens, and quickly disappeared.

"Caiying, come quickly."

Zhou Shu followed immediately.

Caiying also turned into sword light and followed closely behind.

"This is so fast."

"It's already considered slow, if we didn't hit it a few times."

Zhou Shu had already begun to calculate and deduce. He wanted to determine the impact of those impacts on the shock wave.

After following for five days, Zhou Shu stopped, and Cai Ying asked suspiciously, "Why don't you follow?"

"That's not necessary."

Zhou Shu shook his head. The shock wave has formed the prototype of the strange wind. If it continues, it will reproduce the previous strange wind. The process is the same and the trajectory is the same. Based on the data of these five days, he has deduced thousands of times. Every time The result is the same every time, there is no mistake.

Obviously, those few impacts changed the direction of the shock wave, causing the strange wind to rush towards the Xuanhuang Realm.

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

Caiying nodded, "I don't understand, but everything you said is right. Shall we go to Xuanyi Realm?"

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

Caiying asked doubtfully, "Go back now? We won't care about the strange wind. There seems to be a fog demon inside?"

Zhou Shu shook his head, "Those fog demons don't matter. They are just testing the Xuan Yi Realm. If there is a problem, it is not a big deal. We will solve it when we return to the Xuan Huang Realm."

Caiying responded and followed Zhou Shu again.

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

Returning to the fortress, he looked around for a while, but there was still no one there. After bypassing the still-functioning formation, Zhou Shu walked to the huge passage.

There was gray mist coming from that way, but it was restrained by the power of the formation, so it wasn't much.

As expected, this is the key point of the fortress. The material is dark steel, which is much higher than fire copper. The passage is about three hundred miles long and several miles thick, which is comparable to Anding City. There are a total of two in the middle of the passage. There are seventeen layers of formations, layer upon layer. Obviously, these formations are used to block the gray mist and fog demon on the opposite side. However, now there are only remains of these formations, which have been damaged long ago.

What destroyed the array talisman might be the leaked shock wave, or it might be the fog demon and gray mist on the opposite side.

After passing through the pipe, the right half of the fortress is even more empty, without any buildings. In the gray fog, there are many formation disks that have been destroyed by the gray fog. Very simple formation disks are used to release the vitality in the fairy materials and attract the fog demon. , no one has maintained and replenished it for a long time, and the formation disk has become invalid. However, there were a lot of fog demons attracted before, and the thick gray fog has formed a small group of fog demons.

If they hadn't concealed their aura and vitality, I'm afraid a bunch of them would have pounced on them soon.

Seeing this, Zhou Shu seemed to have some enlightenment.

It’s basically confirmed.

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

Which force is so thoughtful that it actually went to the edge of the sky to study the gray mist? Why did it give up and ignore it halfway through the study? Do you want to abandon this hard-built fortress?

(PS: Thank you Suzaku A for your third support and attention, and thank you to all the book friends who subscribed to vote and commented on the collection~~~)