I don't know how deep it is, but as it goes deeper and deeper, the artificially built style around it becomes more and more obvious. On the obsidian-like smooth walls, the white-gold light extends along the intricate notches on it, making the passage completely illuminated, a contrast that contrasts with the feeling of walking in a dark natural cave before.

Xin Yuan and the sandworm walked on this corridor one after the other, keeping a distance of about five meters, and had been walking for nearly half an hour.

"We're going around in circles." Xin Yuan suddenly spoke.

His voice was very flat, no doubts, no anger, as if he usually greeted someone he didn't know well and said hello, but it was this very ordinary tone that made the tall sandworm shudder.

"I didn't mean it, and I don't know exactly how to get there." The sandworm hurriedly explained.

Xin Yuan tilted his head slightly, and his hand rested on the wall beside him, which was marked with a concentric circle. After entering this passage area, he left a mark at the same height on the left side of the passage every time he entered the passage, and now he can see that he has passed through this place once.

"The correct map is only available to Parrion, but it has long been destroyed by him, and everything is in his head." The sandworm continued.

Xin Yuan nodded noncommittally: "Keep going." ”

Seeing that Xin Yuan didn't mean to investigate, the sandworm let out a long breath, and finally let go of the heart he was carrying.

For this cold, powerful and mysterious teenager, he was really afraid.

With the full force of the front unreserved, he was completely defeated in one fell swoop, and this kind of strength can only be done when he reaches the peak of the D-rank.

Don't look at everyone is D-level, but D-level is also divided into grades, and the distance between each level is even larger than the gap between the lower ranks, so it can be said that this time not only hit his body hard, but even his confidence was shattered. Not to mention that he only has a full sixth- or seventh-layer state now, even if he recovers to his heyday, he will only have to go around the road when he sees Xin Yuan in the future.

Of course, what he couldn't see was that in order to exert this level of strength, Xin Yuan also paid a lot of price - that is, he used the altar replacement method when he dealt with the two D-class assassins in the first place. At that time, he paid the price of damage to the structure and long-term contamination by leaked energy, and the aftermath has continued to this day; At the moment of hedging, the energy layer of the damaged mouth of the structure that was originally blocked by the potion in his body was directly broken, and the energy pollution leaked from the backflow hit him hard in an instant, and he barely blocked the damaged mouth after using up all the remaining potions at once, but it seemed that there was no problem on the outside to cover up the actual situation.

The sandworm didn't expect that the D-class peak powerhouse in front of him was actually not much less injured than him. If he had seized the opportunity before, it was very unlikely that he would want to win against Xin Yuan, but there was still a certain possibility of escaping, but now that it has dragged on, this opportunity will naturally disappear - his injuries are almost cleaned up, and Xin Yuan has basically recovered.

For those who have entered the D-rank, relying on the physical strength and recovery ability that far surpasses mortals, as long as they are not seriously disabled, they can recover quickly, plus various special drugs specially developed for those with extraordinary abilities, although they will not be intact, it is still possible to recover a certain combat ability in a short period of time.

The injuries of the sandworms look miserable, but they are mainly contusions on the body, and there are no major problems with bones and internal organs, and there is no problem with recovery; As long as Xin Yuan blocks the energy leakage and pollution, it is very fast to remove the pollution in the body and repair it.

Judging from the recovery ability alone, the two of them are half a catty.

This is also the reason why Xin Yuan was not in a hurry to urge the sandworms to hurry before.

With the markers to eliminate some of the wrong paths, this time the path of the sandworms was finally reliable - after turning a corner, some slight movements were transmitted from the front to their side.

Both of them are veterans, so they don't need to communicate anything, they just hold their breath and condense, and quietly approach the place where the sound came from.

It is a long corridor with an intersection at the forefront. Just when the two of them were approaching about twenty meters, suddenly two blue-white figures jumped out from the crossroads on both sides of the crossroads, silent, without warning at all, as if they had been there all along.

The sandworm in front of him was startled, took a small step back, and gestured to Xin Yuan.

"Guards?"

Xin Yuan immediately understood what the sandworm meant, and what appeared in front of him should be the guards that the sandworm had encountered.

The guard in front of him was generally humanoid, but his body was very thin, his head was like a flattened mask, and his limbs were also flattened like blades, like a paper man, but he knew that it was very dangerous by the flickering cold light on the edges of his limbs.

According to the sandworm, the automatic protection force of this layer is composed of the sharp blade guard in front of him and the tentacle tree roots encountered before. The blade guards in front of them are like white blood cells in their veins, very flexible and specialized in strangling invading bacteria, while the tentacle roots are relatively sluggish, more like a circulatory system, acting as scavengers.

The two bladed guards who jumped out didn't even glance at the passage where Xin Yuan and the sandworm were, and jumped lightly into the opposite passage as if they were not important, and soon ran away with one jump.

"Let's go." Xin Yuan said softly.

The sandworm nodded, moving forward quickly, Xin Yuan followed silently, and arrived at the intersection in a few seconds.

Leaning out and looking left and right, the sandworm breathed a sigh of relief, like Xin Yuan signaling that it was no problem. According to the sandworm, this kind of blade guard is very difficult, just like a machine, it is not afraid of life and death, and it is very troublesome to deal with it, so it is better not to encounter it.

Coming to the crossroads, Xin Yuan looked to the right, and then to the left, which was exactly the same as the passage environment they had just come over.

Just when he was thinking about which direction to go next, he suddenly saw a drop of white liquid on the ceiling of the passage on the right side moving quickly in a straight line towards the crossroads, growing larger as it moved, and when it reached his eyes, it even turned into a large white opaque bubble more than one meter high, and stopped at the intersection.

It was all done in the blink of an eye, and then I saw the bubble shake, and a figure fell from under the bubble to the floor, without any drops of water falling or making any sound, and it was the same bladed guard I had just seen.

At this moment, the two finally knew how the two bladed guards appeared before.

In the next moment, two red rays lit up at the position of the eyes of the two sharp blade guards, and they locked on the two of them respectively.