This black hall is smaller in scale than the empty hall when I first entered, but in terms of overall style, it is still that rough and bold style.

The front of the main hall was an extremely heavy stone door, which was tightly closed and did not open, Duan Fei and Zhan Wuji stepped forward and tried to push it, but as the two of them worked together, the stone gate did not move.

At this time, Duan Fei's explosive supernatural power had already entered the cooldown period, but even if Duan Fei was able to increase his strength several times, looking at the posture in front of him, it was still very likely that he would not be able to push open this stone gate.

The structure of the stone gate looks very rough, but it is obvious that there is another mystery, and it is very likely that it is controlled by a mechanism, and it is definitely not a brute force that can force it open.

Next, Duan Fei took a closer look and found that there were many potholes on the stone gate, each of which was the size of a pigeon's egg at most.

Duan Fei stretched out his hand and buckled it in the pit, and there was nothing too special, so he took a few steps back and began to carefully examine the stone gate.

The stone door of the main hall is about two zhang high, more than two zhang wide, although the thickness is not known yet, but the feeling of pushing up is very heavy.

After Duan Fei took a few steps back, he was able to see the whole picture of the stone gate, as long as he counted carefully, he could see that there were more than a thousand holes on the stone gate, although it looked chaotic and irregular, but it was by no means naturally formed, but artificially carved.

Since there are traces of artificial carving, then there must be another mystery in this.

After Duan Fei carefully observed it again, he couldn't help but have a flash of inspiration in his mind!

If these pits on the stone gate are connected by dotted lines, wouldn't they just be a picture of the stars in the sky? And these holes correspond to all the stars in the sky!

With such an idea, Duan Fei quickly recognized that the Celestial Aspect Star Map on the stone gate happened to be a part of the Celestial Aspect Star Map on the dome of the empty hall, which only accounted for about a quarter of the entire Celestial Aspect Star Map.

In this way, Duan Fei also understood that if the stone gate was indeed controlled by a mechanism, then this mechanism must be related to the Celestial Aspect Star Map!

Duan Fei looked back at the stone road he had walked all the way, weren't those stones exactly the same size as the potholes on the stone gate?

In this way, Duan Fei had nothing to hesitate about? He directly squatted down, picked up the stones on the ground and flicked his fingers repeatedly, only to see that after the stones flew up, they were very accurately stuck in the pit on the stone door.

After Zhan Wuji saw such a scene, he had to admire Duan Fei's flexibility in thinking, and he thought of a way to crack the Shimen mechanism so quickly.

If Zhan Wuji had been here alone, by the time he found out that the stones could fill the hole, he didn't know how long it would have been.

After a while, more than a thousand holes on the stone gate were all filled with stones, but the stone gate still did not have any movement, as if no mechanism had been triggered.

Zhan Wuji didn't understand this, he could only glance at Duan Fei with a suspicious look.

Duan Fei carefully observed the "Celestial Aspect Star Map" on the stone gate, and after careful comparison, he found that the nine pits on the stone gate were redundant, and there was no existence of these nine stars on the real Celestial Aspect Star Chart.

There were more than a thousand "stars" in total, and Duan Fei could tell in a short moment that nine of them were redundant, all because he had memorized all the celestial and star maps on the dome in the empty hall before, and he himself could not have imagined that they would play a role so quickly.

Just after Duan Fei took off the nine extra stones, he only heard a series of "Kakaka" sounds, and sure enough, the mechanism was successfully activated, only to see the incomparably heavy stone door slowly open, and soon it became the appearance of the door being fully open.

Seeing this, Zhan Wuji was surprised and delighted, and couldn't help but say, "Senior Brother Duan, you are really a good method, why do you seem to know the subtleties of the mechanism here?"

Duan Fei didn't show too much pride, but said lightly: "Actually, these pits on the stone gate are the same as the celestial phase star map on the dome of the empty hall that first came in, as long as the correct celestial phase star map is spelled out, it will not be difficult to open the mechanism." ”

Zhan Wuji was even more surprised when he heard this, and couldn't help but say, "These holes on the stone gate are actually celestial phase star charts? It's remarkable that you can see this, and you can actually compare nine of them to be redundant? Doesn't this mean that you have memorized the entire celestial phase star map?"

"Everyone is just passing through that hall, even if the celestial star map on the dome is very gorgeous, who will deliberately write it all down? Senior Brother Duan, I kind of understand, it really makes sense that you can have this achievement today!"

Seeing Zhan Wuji's admiring look, Duan Fei naturally wouldn't explain to him that he actually had other ideas when he wrote down the Celestial Aspect Star Chart, but it just happened to play a role at this time.

Since Zhan Wuji wants to admire, let him admire, which will be more conducive to Duan Fei taking the initiative in cooperation.

At this time, as the stone door opened, this black hall was equivalent to being undefended, and Duan Fei and Zhan Wuji entered the hall side by side after glancing at each other.

The light in the hall is relatively dark, and it looks gloomy and gloomy in all directions, giving people a feeling that it is not very good, as if there is some danger hidden in the dark.

The layout of the main hall was long and narrow, and after Duan Fei and Zhan Wuji entered the gate, the further they walked, the darker it became, and by the time they almost reached the end of the main hall, it was already so dark that they couldn't see their fingers.

You don't have to worry about not being able to see the path in the main hall, but if you can't see the surrounding environment, who knows if there is something else here?

At this time, without waiting for Duan Fei to speak, Zhan Wuji directly used the fire spiritual power as if he was trying to show it, as if he had turned himself into a humanoid light bulb, and emitted fire light towards the surroundings.

In this way, the fire in the main hall is naturally bright, which is enough to see the surrounding environment clearly.

To the surprise of Duan Fei and Zhan Wuji, at this time, the position only a few zhang away from them should obviously be the end of the main hall, but there was no exit portal, but it was tightly sealed by a wall.

The wall looks convex and concave, as if using the technique of relief carving, several fierce beasts are vividly carved on the wall, at this time by the firelight, the fierce beast actually has a feeling of coming to life, and there is even a fierce power on behalf of the demon beast to radiate outward!