Soon, it had been three days since Yang Xiaokai came to the periphery of the underground big hollow.

Because there are too many domestic animals killed, the title of liking to eat human offal has not come out, of course, whether it is staying inside, or whether it is looking for food from other places is another matter.

In the past three days, because he didn't bother, Yang Xiaokai got a lot of gains.

First of all, except for the big hole, the maps in other places have been almost sorted out by him, and there are basically no dead spots in the system.

Not only that, but through the Dao method, Yang Xiaokai implanted surveillance into the Dao title, and from them in and out, he also got a lot of information inside the big void.

Inside the big hollow, there is supposed to be a processing plant, and there are building facilities everywhere.

Although it is not known exactly what they are building, the first thing they process is obviously the stone mined by the underground livestock.

Lying in the corner, Yang Xiaokai curled his body, his eyes slightly closed as if he was sleeping.

But in his hand, he was holding a black stone about the size of his thumb.

This thing is the first process to be processed, the size of a thumb, and it is basically extracted from nearly ten tons of heavy stone.

And this thing, Yang Xiaokai is no stranger.

When he was in the Northern Empire, he came into contact.

Well, the core ingredient of the Battle Costume is the Demon Stone.

I finally understand why a place that seems to be cultivating twisted perverts is doing such an operation.

Unexpectedly, under the land of the Frost Empire, there is a must-have item for making a battle magic costume that is incomparably lacking in the whole world, the Demon Stone.

But....

Touching the Demon Aversion Stone, which was not infiltrated into the miscellaneous materials, Yang Xiaokai's face showed a hint of discoloration.

Because he had only seen it in the introduction before, and there was no personal touch, this kind of material was only understood, but when he actually came into contact, he immediately found that this thing was very similar to something.

That is, the spirit stone.

No, it shouldn't be said to be a spirit stone, but it should be said to be something that was produced by a spirit stone that was fundamentally reversed.

Unlike the spirit stone that exudes aura, that thing has the effect of inhibiting, devouring, and destroying the aura, so it is named the spirit exterminating stone.

However, the appearance of this thing can be said to be very difficult, unless it is a non-peerless person, who launches a great battle, causing cosmic turmoil, causing several galaxies to collapse, and there is still a batch of spirit stones that happen to be at the central flashpoint.

Obviously, this kind of thing is basically impossible.

After all, compared to the transformation of the spirit stone, it would undoubtedly come faster to directly disappear under that force.

Touching the spirit extinguishing stone in his hand, Yang Xiaokai's eyes had a different color.

Soul Stone... , and then the history of this world ... Is this world really a universe with completely different rules from the Infinite Palace?

Shaking his head, Yang Xiaokai quickly let go of this thought.

After all, his purpose here is not to explore the truth of this world.

Almost....

The exterior has been inspected, and what is missing now is the specific situation inside the large internal cavity.

But....

Taking a deep look at the depths of the big hollow, Yang Xiaokai quickly withdrew his gaze.

Inside, he had to go once, but not now.

Before leaving, you must prepare all the other plans, especially the retreat, so that you can immediately start and completely destroy this place after you have completed your exploration.

The old trick was repeated, Yang Xiaokai directly woke up one of the people around him, and then took out the person he replaced, quickly got out of the place where he was in the chaos, and then began to dive underground.

If you want to completely destroy this place, you can't do it easily.

The geology of the Great Bear Pass itself is very hard, especially the surface layer, in order to resist the invasion of monsters, the hardness of all buildings is almost no worse than that of the anti-nuclear explosion project.

If you want to completely destroy this place, in addition to destroying the fulcrum, you need to catch the power of nature.

For example, crustal movements, volcanic eruptions.

Daxiong Pass, itself is geographically located in the coastal zone, although it does not belong to the center of the earth's crust movement, but it is not far from it, and there is indeed a large crack in the position of the junction with Duoge. According to the analysis of this world, after thousands of years, there is a high probability that the land of the country of Dogg will be completely broken off from the entire continent and become an independent island.

With such a huge crack, you can imagine what it will be like to be underground.

Of course, under normal circumstances, that crack can't reach the Big Bear Pass, so there is basically no need to worry about this problem, but unfortunately, I met Yang Xiaokai.

Among the spells he collected, although there were not many such spells, there were about 10,000 of them.

Speaking of which, I have to mention that when that organization met Yang Xiaokai, it was definitely a blood mold.

With the hardness of the Great Bear Pass, even if it is discovered by the three major empires and attacked, it can hold out for a while.

Quickly descending nearly three thousand meters, Yang Xiaokai quickly felt where the big crack was.

I have to say that the geographical location of Daxiong Pass is really good.

The Great Crack was indeed torn in this direction, but there was a huge stone horizontally across the Partial Bear Pass, which was extremely hard, just enough to block the Great Crack underneath.

Of course, it is clear that this stone will not be able to stop the movement of the earth's crust below forever, and after a few hundred years, it will probably be gone.

When the thought fell, Yang Xiaokai quickly stood directly on the huge stone and began to arrange the formation.

The formation is also very simple.

Weakens the hardness of stones.

When the hardness drops by a factor of ten, the place is basically unsustainable.

Of course, even if it is weakened, it is impossible to choose a place randomly, and according to the construction situation above, Yang Xiaokai quickly began to arrange.

Not only is it a formation that weakens the hardness, but at the same time, Yang Xiaokai also arranges absorption and backlog formations on it.

When this stone is disconnected and the power gushes up, it will continue to accumulate there, constantly compressed, compressed, until it exceeds the limit of the formation.

After spending almost half a day and arranging everything, Yang Xiaokai returned to the underground labyrinth again.

The formation is continuously implanted on the fulcrum of the labyrinth.

It took almost a day to arrange everything, and Yang Xiaokai glanced at the outside of the maze with some regret.

It's a pity, if it weren't for the fact that the periphery was covered with special soil, which would react immediately once it invaded, he wouldn't mind turning the entire underside of Daxiong Pass into tofu slag, and when the volcano erupted, he would directly blow up the entire Xiongguan into the sky.

After doing everything, Yang Xiaokai took a breath and prepared to leave the underground and go back to explain to Charlotte.

Well?

Just as he was about to leave the underground, Yang Xiaokai's eyes suddenly froze, and his movements stopped.

This is...?