"Boom!"

As everyone approached the stone city, the gate opened automatically.

What surprised Lu Xuan even more was that he originally thought that there would be a city behind him, but it turned out to be a dark passage.

The floor of the passage is paved with stone slabs, and the surrounding walls are reinforced with stone slabs, and the walls are inlaid with some glowing stones.

Looking at the passage in front of them, Sylph and Ellie looked at Lu Xuan, waiting for him to make a decision.

Lu Xuan's eyes narrowed, and his mind began to spin rapidly.

For some reason, when the passage appeared in front of him, he suddenly felt like he was invited into the urn!

"It's definitely a trap!" Lu Xuan said secretly in his heart.

Combined with the system's mission, he was almost certain that there was a high probability that it was a conspiracy against him.

However, even if he knew that it was a trap, he didn't seem to have any other choice.

Sylv and the others searched for a long time, but they still couldn't find a way out of the abyss.

Then, the way to get out of this abyssal area is very likely to be in it!

What's more, he didn't plan to give up the task assigned to him by the system this time.

"Let's go, there's no other choice now!" Lu Xuan said.

Then, he led the way to the passage.

Naturally, everyone had no opinions, and they followed closely behind Lu Xuan.

The passage was very quiet, and the echo of footsteps could be heard as the group walked through it.

The space is quite spacious, and more than 20 of them walk in it, and they don't feel crowded at all.

At this time, Luo Tong subconsciously glanced at the stone on the wall as a channel light source, and soon showed a look of surprise.

"Lu Xuan, look at those stones, they seem to be night cloud stones!" Luo Tong said.

When Lu Xuan heard this, he also looked at the light source on the wall.

Soon, he couldn't help but be surprised and said, "I'm going, so extravagant?" ”

After having traveled to this world for so long, he naturally has some understanding of some of the special resources of this world.

Especially those that are more valuable!

Nocturnite is a rare and special ore that can only be produced in some places with special geographical environments.

This kind of ore has a good effect of calming the mind and recuperating the spirits, and also has the effect of restraining monsters, which is an essential material for many human weapons.

But because it's rare, it's also extremely precious!

In a popular phrase, the market price of a night marble the size of a thumb is 100,000!

Each of the night marbles embedded in the walls is the size of a football!

With such a light source, you can see one every ten meters in the entire passage, what a luxury!

If you can bring these back, it will be an unimaginable asset!

Even if you don't sell it, you can also build weapons for the students in your martial arts hall, Yan Lingxue and they don't have the weapons they have yet!

What's more, if this is really the trap of the mastermind behind the scenes, then you won't take it for nothing!

Saying that action is action, they came to the night marble embedded in the wall and tried to dig the night marble from the wall.

However, the stone on the wall did not know what it was made of, and it took a lot of effort for them to dig it down.

After the night cloud stone was dug down, there was no other change in the passage, and Lu Xuan couldn't help but breathe a sigh of relief.

The reason why I dug so carefully just now was because I was afraid that I would touch some mechanism here.

Now it seems that they are overthinking.

Hilf and the others watched Lu Xuan and the others digging stones, and couldn't help but be a little puzzled.

Their tribe does not still have a well-established economic system like the earth, so in their opinion, although the nebulous stone is scarce, it has no concept of value.

However, at Lu Xuan's instigation, they also dug up some night cloud stones.

Lu Xuan thinks that these may be used as start-up funds for the establishment of the base city after they relocate to Earth.

Although Sylph and Ellie didn't understand it very well, since Lu Xuan said so, they had no choice but to do it.

In the end, the group dug up some nectar.

For example, Luo Tong himself dug two and stuffed them into the tactical backpack, which was not much weight to him.

Space in the tactical backpack is limited, and he's not a greedy person, so digging two is enough.

Hilph and the others also dug a lot, after all, there are more of them.

Of course, the biggest gain is still Lu Xuan.

After all, he still has a spatial ring, and he has almost filled the entire ring.

He didn't plan to sell all of these Night Cloud Stones, but was going to hand them over to Xiao Yunyan to create new equipment for the students of the martial arts hall!

In this way, a passage that was originally bright ended up with potholes in the walls.

Soon, everyone finally came to the end of the passage.

Passing through the passageway, they entered a wide stone hall with many fallen stone pillars, which seemed to have been abandoned for a long time.

However, in the stone hall, there are still several monsters with huge bodies and hideous and terrifying faces.

Their strength is all the strength of the king level or above!

Among these monsters, the body is covered with tentacles and is extremely large, surrounded by other monsters!

It's a king-level monster!

"That's a tentacle sticky demon, which can split countless tentacles, each tentacle can be extended for nearly a thousand meters, has a strong stickiness, once it is sticky, it is difficult to break free, and it has the ability to regenerate!" Luo Tong said.

"In addition, the defense of the shell on their body is also very strong, it is a kind of monster that is difficult to entangle, I didn't expect so many heads to appear here at once, and one is emperor-level!"

"Shall we go up now?"

Ellie, holding the big axe, asked with some eagerness.

The area of this stone hall is very large, and when Lu Xuan and the others walked in from the passage, the monsters over there didn't notice them for the time being!

Ellie seems intent on taking advantage of the opportunity to attack.

However, Lu Xuan stopped her.

The expression on his face had been strange since he first entered here.

Because he had just heard a few voices, and then he listened carefully to the monsters that were coming from over there.

"What are you going to do when you say you suddenly called us here?"

"How do I know? It always feels like something is going to happen! ”

"Why is there so much nonsense, our eldest brother is a beast emperor, and it's not a matter of one tentacle to really touch a human being!"

"I'm hungry and want to eat!"

"Eat, eat, eat, you know how to eat, and I want to eat humans too!"

……

Lu Xuan's whole person was stunned, and he was shocked in his heart: ", I can actually understand!" ”

Monsters can't speak until their strength reaches the emperor level.

But this is not to say that monsters do not have a language of communication, and the intelligence of monsters with king-level and emperor-level strength is actually no worse than that of humans!

It's just that they can't speak human language.

But the problem is that now Lu Xuan can actually understand their communication!