A few people looked in the direction that Chen Ziyang was looking, and although this place was underground, the golden light emitted by the nine armors illuminated a large area, and even the nearest rock wall could be seen clearly. But several people looked at it for a while, and they didn't understand what Chen Ziyang meant.

In addition to the triangular formation, the entire underground space was covered with black and white bugs, which kept gnawing on the dirt.

A few people saw a very interesting phenomenon, black and white insects all exist in patches, black insects gather together, and white insects gather in other places, as long as there is an area where black insects gather, there is not even a white bug, and vice versa.

All the black and white bugs form a completely different area and style, like irregularly shaped floor tiles laid together.

"Huh?" Jin Huang seemed to see something, he stood up, stood on tiptoe, and looked as far away as he could, and the other people were inspired by Jin Huang and looked in that direction.

Probably at the edge of the range where the golden light could shine, there was a very strange pattern on the ground. The pattern is still made up of black and white, and compared to the irregular patterns made of black and white bugs in other places, the pattern here is more regular and looks like a circle.

If you look closely, this pattern is divided into two parts, left and right, and it looks like a pattern of a yin and yang fish. The most amazing thing is that in this pattern, there are two black and white circular areas, which are actually the fish eyes of the yin and yang fish, which should also be composed of these Gu worms.

"You mean there?" Several people understood what Chen Ziyang meant, and as he said, that area was really too special.

"It should be there, as long as someone uses mana to accelerate the activation of the formation, this formation can keep the Gu worms out and protect the safety of the people inside, so that the people in the formation can see these patterns composed of insects outside, and they will also find the yin and yang fish."

"Will it be so magical? It can't be just a coincidence, or maybe it's because the light is a little dim that gives us an optical illusion.

Why are these insects so obedient that they put on a pattern of yin and yang fish on the ground? Besides, there's no one to direct them? Xu Xiaoyuan asked in disbelief.

"That shouldn't be a coincidence." A relatively weak voice came from behind Xu Xiaoyuan. It turned out that Shangguan Kangning had already woken up, and was staring at the handful of dirt he was holding in his hand.

In this handful of dirt, there were a few black and white Gu worms that had been photographed into meat pies by Yang Lei and Umbrella Shi Shuai, and Shangguan Kangning's attention was obviously not on these bugs.

He slowly picked out the flattened bugs and tossed them aside, until all that was left in his hand was some dirt.

"Come and see, I think the reason why those black and white Gu worms are arranged in a pattern should have something to do with the soil here."

"Dirt?" Anyway, now that the outside was full of black and white Gu worms, and a few people had nowhere to go, they gathered around Shangguan Kangning, trying to figure out what was going on.

After fiddling with the dirt in his hand for a while, Shangguan Kangning picked up a few small clods from it and put them aside.

"Look at these clods, do they have little black and white dots on them? I think the reason why these Gu worms can pose the pattern of that yin and yang fish is related to these black and white color things. ”

A few people stared at it with wide eyes, and sure enough, on the few clods of soil picked out by Shangguan Kangning, there were black and white dots, which looked like soot and soot.

"What are these things?"

"This should be a fungus, but the size of this fungus is not big, the reason why those black and white insects will suddenly appear here to eat the soil is because there is this fungus in this layer of soil on the surface, and the black insects should only eat black bacteria, and the white insects only eat white bacteria, so the black and white insects will be distinct on the ground.

That's because in a place where black bugs gather, there are only black fungi in the soil. If you think about it this way, maybe the yin and yang fish pattern on the ground has been arranged a long time ago, and it is the use of these fungi, as long as the Gu worms appear, they will go to find food, and naturally, they will form a pattern on the ground.

That is to say, in fact, the patterns displayed on the ground have already been drawn below the surface with these fungi, as soon as the Gu worms appear, they will reproduce this pattern on the ground, and the hidden clues will be clearly revealed. ”

"What you said is more reasonable, but if these fungi have long been hidden under the soil, why haven't those Gu worms appeared to eat these mushrooms after we have been here for so long, but only after the formation is activated, the Gu worms will not appear?"

Shangguan Kangning shook his head, not knowing how to answer this question.

"That's the ingenuity of this mechanism's design, if I'm right, the reason why there weren't these black and white Gu worms here before was because these fungi weren't mature.

However, when the mana in the armor accumulates to a certain extent, this mana will cause the fungus to start growing in the surrounding soil.

The size of this fungus is very small, and it is not impossible to let them mature in an instant through the catalysis of mana, so those Gu worms did not appear before, but they only ran here after the formation was about to be activated. ”

Now Chen Ziyang admires this organ left by Yuan Tiangang with the five-body throw. Every ten years, when the formation is activated, the mana gathered in the armor will spread to the surrounding area, so as to promote the maturity of the fungus under the surface.

And when these fungi mature, they will attract Gu worms, use Gu worms to mark the pattern of the yin and yang fish, and at the same time use this formation to protect the safety of those who come here.

In this way, it can be guaranteed that the person who can see the clues must be the descendants of the Taoists, or the people who know the method of activating the formation, so as to prevent someone from coming here by mistake and getting the treasure left by Yuan Tiangang.

Because if the people who didn't know the method of activating the formation came here, they couldn't be protected by the formation before the Gu worms came over, and they would most likely become food for these black and white Gu worms.

Chen Ziyang also understood why his blood was not attractive to these Gu worms. In fact, it's not that blood is not very attractive, but in comparison, these Gu worms prefer these fungi on the ground, and they are much more attractive than their own blood.

"Hurry up and rest, I think it won't be long before these Gu worms will disperse, and then we still have a way to go." Chen Ziyang said to several other people.

According to the current situation, Chen Ziyang estimates that it won't be long before these Gu worms will eat the fungi in the soil, because this is underground after all, there are many rocks, and the soil layer on the surface is not very thick, so there shouldn't be too many fungi in it.

After the fungi in the soil have been eaten, these black and white Gu worms should retreat to their nests and enter a state similar to hibernation, until ten years later, when the formation is activated again, they will wake up from hibernation and eat again.

The others also understood what Chen Ziyang meant, and they sat on the ground one after another and stopped talking.

In the period of time before the formation was activated, the physical strength of several people was seriously overdrawn, and it seemed that the treasure left by Yuan Tiangang was very likely to be in the next layer, and he didn't know how far the road ahead was, so it was very necessary to maintain his physical strength.

After a while, the Gu insects on the ground became agitated, and they no longer gathered in place, but kept crawling all over the ground, apparently looking for any fungi that had not been eaten.

At this time, the whole ground seemed to come alive, black and white kept alternating, the patterns on the ground kept changing, and after a while, these Gu worms crawled towards the rock walls on both sides like a tide, and they were buried into the darkness and could no longer be seen.

As the Gu worms left, the golden light emitted from the nine armors gradually dimmed until they completely disappeared.

Chen Ziyang pressed his hand on the back of the general's armor, and felt it carefully, now that all the mana in the armor had been used up, and he couldn't feel any mana from the armor at all.

But the iron rods that supported the armor stuck into the ground and the wisps of mana poured out and poured back into the armor. Only this time, if you want to fill the armor with mana, it will take another ten years.

Because the Gu worm on the ground had disappeared, the pattern of the yin and yang fish on the ground was also gone, but several people had firmly remembered the location, and after walking nearby, they looked down and looked at it.

This piece of ground is no different from the surroundings, and if you don't know in advance that it's here, even if you walk on it, no one will notice that there's something hidden here.

Fortunately, with the reminder of the black and white Gu worms before, a few people discovered that there were some small cracks in the ground here, and it seemed that this ground was a whole stone slab completely covered with dirt, and there was a trace of cold wind blowing out of these cracks.

The sapper's shovel pried open the slab, revealing a number of mossy slab stairs that descended into the darkness, and it was unknown how deep it was.

When the board was opened, a very strange smell wafted into the nostrils of several people, which smelled mixed with some herbaceous aromas and a slight rancid smell.

This time, the six people did not come out with the advanced equipment of air quality detectors, Chen Ziyang tested the soil method recorded in the "Civil Engineering Collection", and he found that the air blowing from the depths of this passage should be safe. He led everyone into it one by one.

Maybe it's because he has passed Yuan Tiangang's test, there is no mechanism hidden in this passage, the only thing everyone needs to be careful about is the slippery steps, and it is really not easy to walk on these mossy steps without slipping.

The length of the stairs was beyond the imagination of a few people, and compared to the distance between the underground space and the ground where the nine armors were located, the passage did not know how much it would grow.

But what Chen Ziyang didn't expect was that despite walking such a long distance underground, the surrounding temperature did not drop at all, and there was even a trace of warmth.

This is too unreasonable, there is a lack of light here all year round, logically speaking, the temperature here should be below zero all year round, these steps should be frozen, but there is still moss growing, it seems that the temperature of the place where this passage leads should not be low, but I don't know what it is.

After walking some distance, the steps disappear and are replaced by a crack in the mountain with a gentle slope. And this crack is getting wider and wider.

Yang Lei knocked on the side wall of the crack with the sapper shovel in his hand for a while, looked at the stone ballast stuck to the sapper shovel and said: "These seem to be volcanic rocks, it seems that this crack was formed in the movement of the volcano, no wonder the temperature here is not low, and the air is so humid, I estimate that there should be an underground hot spring here." ”

His words were soon verified, and when several people reached the end of this mountain crack, they saw a large underground lake steaming with a trace of heat.

Looking at the scene in front of them, the six people stared at twelve eyes, without even blinking.

"Wow! So beautiful! Xu Xiaoyuan covered her mouth with her hands excitedly like a girl who was just beginning to fall in love, and shouted loudly.

At this time, the scene unfolding in front of the eyes of the six people can only be described in four words: fairy tale world.

Countless pink and blue-green lights filled this underground world, UU Reading Books .et In this incomparably huge, endless underground space, all the rock walls that everyone could see were covered with such sparkling light, like an endless night sky.

Both the side rock walls and the top of the underground space are filled with these points of light, and the large number of rocks and points of light reflected on the surface of the clear underground lake makes it difficult to tell where the real rock is.

Countless points of light flew in the air, looking like countless fireflies, making this slightly dead underground world full of life.

If you look closely, some mushroom-like fungi that emit a lilac glow are all over the rock wall, although these lights are not very bright, but after a large number of luminous fungi gather together, they actually illuminate the moss on the rock wall clearly.

And the things flying in the air were not fireflies, but mosquito-like flying insects that emitted a blue-green light.

This bizarre underground world deeply shocks everyone's heart.