My skills have special effects.

Chapter 190
This is a one-meter-sized stone cave, and Lin Yan wouldn't have been able to discover it if there hadn't been an undercurrent surging out of it.

The dark bottom and the deep cave, when put together, Lin Yan instinctively panicked, like the entrance to hell.

Dispelling the instinct in his heart, Lin Yan spread out his palms, lit up a mass of seizing demon fire, used as a light source, and drilled into the cave.

The size of the hole is not small, enough for one person to pass through. The wall of the hole has been washed back and forth by the undercurrent, and it has already become extremely smooth.

Moreover, the cave wall should be vertically downward, like a deep well at the bottom of a lake, leading to an unknown deeper abyss.

However, as Lin Yan swam further in, the interior of the cave shrunk and became narrower and narrower.

Only less than 30 meters down, it is so narrow that people cannot pass through.

Lin Yan tried to chop the rock wall with a flaming weapon. Although it was like digging out tofu, the cave was straight down!

Dig out the fallen rocks, there is no way to deal with them easily, if you are not careful, you will fall down, and the underground cave will be blocked instead!
After all, rocks cannot disappear out of thin air.

So the way of digging down cannot succeed at all.

Helpless, Lin Yan could only retreat from the cave.

"There is an undercurrent gushing out of the cave, which means that there must be some space or exit at the other end of the cave..."

Lin Yan's heart sank slightly. He was sure that the underground cave could lead to the place where the dragon sucked water, or to the outside world.

But if the cave is too narrow for people to pass through, what should he do?

But on second thought, when he was in the Longsi water pond, he saw the salamander with a glimpse.

Since a salamander of that size can pass through, there's no reason why he can't pass, right?
"So, either, there are other entrances inside this cave, or there are more cave entrances under the lake!"

After sneaking out of the cave, Lin Yan swam out for a short distance, and suddenly found a faint jade pillar looming in front of him.

"No wonder I met so many venomous trout just now. It turns out that there is a jade pillar here..."

But when he thought of this, Lin Yan's heart was shocked, and he looked under the jade pillar, and saw that under the jade pillar, it was deeply embedded in the rocks at the bottom of the lake, and was closely connected with the rocks.

Looking up again, the jade pillar rises from the bottom of the water and keeps going upwards, like a needle that fixes the sea, extending to the surface of the lake.

"This jade pillar is embedded in the bottom of the lake and extends to the surface of the lake. If it is to remain stable, it must be at least 300 meters longer!
"The jade pillars of this length are living creatures, and there are hundreds of them, and they can grow mysterious and strange things.

"Where is the sacred handwriting? Is it the ancient Fan Kingdom?"

I looked around the jade pillar for a few times, but couldn't see anything more for a while.

I can only dive out again to find the next possible cave.

Originally, Lin Yan thought that finding the cave would be very difficult, but he didn't expect that after only swimming a short distance, he felt the undercurrent in the water again.

"No way, is it my luck, or...there are a lot of undercurrent caves under the water?"

Swim down the undercurrent again.

Suddenly, in the dark current, another group of trout with venomous teeth rushed out and submerged Lin Yan.

"Again!"

Lin Yan was helpless, so he had to transport the Spirit Seizing Demon Fire again to kill a large area, even too many, and the absorbed essence could not be stored, so it could only be wasted

But this time, there was no plate-jaw salamander to harass.

"Poison-toothed trout, entrenched next to the jade pillar, feed on the secretion of the jade pillar, so, there is another jade pillar nearby?"

Just a simple search, Lin Yan once again saw a jade pillar standing upright, extending to the sky above.

And that undercurrent cave, after Lin Yan sensed it, is also near this jade pillar!
"The last undercurrent cave was near this jade pillar, but this time the undercurrent cave is also near this jade pillar?

"Is it a coincidence, or...under every jade pillar, there is a similar cave?!"

Lin Yan swayed his body like a swimming fish, and soon got into the cave near the jade pillar.

Diving into it, the cave this time is different from the last one, the size of the cave entrance is similar, but the rock wall inside the cave is smooth, but at the same time, there are some remaining traces. The rusty copper and iron objects do not seem to have any effect, but they are obviously not naturally formed.

"Could it be that the walls of this cave were excavated by humans?"

Full of hope, Lin Yan quickly dived into the cave.

However, after only diving for less than 30 meters, I encountered the problem of narrowing the entrance of the cave again, and it was impossible to pass through.

Tried digging a few more times, but to no avail. In desperation, Lin Yan had no choice but to come out of the hole again.

"The wall of this cave is too narrow, and there are artificial traces, and there are two consecutive openings like this. Could it be that it was specially made by humans to prevent people from passing through?"

Lin Yan had a bad premonition in his heart. If this is the case, even if there is a cave next to every jade pillar in the underground, it is very likely that no one can pass through each cave!

Even if some of them can pass, it will take an unknown number of searches and tests before they can be found.

However, the chaos and mist are coming soon, and his time is running out!

Lin Yan was silent for a moment, then turned around and continued to search!
No matter what, you can't give up. The fact that the plate-jawed salamander can appear in the Longsu water pond already shows that there must be a passage leading to the outside world in this underground cave, and it is enough for one person to pass through!

Swim to the next place again, the same venomous trout attack, the same Optimus Pillar, and the same straight-down cave!
Lin Yan was finally convinced that this was not a coincidence, but a human-made trace!
Although I don't know why this is so, it is enough to make Lin Yan both excited and heavy.

The excitement is that the purpose of his coming here is to find the remains of the ancient Brahma Kingdom, and now he has finally found artificial traces, and such a complicated and huge project is absolutely inseparable from the ancient Brahma Kingdom.

However, he also further confirmed that the cave here is also large and small, and it is impossible to pass through it normally!

Swimmed three times in a row again, all of which were the same cave, the same size, and also impassable.

Lin Yan also tried to dig down forcibly, embedded the excavated rocks in the cave wall, and tried to dig out a passage for people to pass through.

However, the volume of the rock will not disappear out of thin air. While excavating a space, it also means that another space is blocked.

This made Lin Yan think of a science fiction novel "Mountain" that he read in his previous life for no reason.

It describes a civilization that is sealed in the underground world and wants to dig out the ground to enter the outside world.

But every time they dig out a piece of space, it means that the original living space inside will be occupied by the dug out rocks. Only by sacrificing the living space at any cost can they finally break through the blockade of the rock formation and come to the vast outside world. space.

But before digging out the rock formation, when the thickness of the rock formation is not known, who knows how long it will take to dig, or whether it can be dug through?

Lin Yan is facing such a predicament at the moment.

If he insisted on digging down, he could do it.

But who knows how far to dig?

Dozens of meters? 100 metres?

Even 1000 meters?

Perhaps at the end of the digging, he got stuck halfway and couldn't dig a path that could accommodate him.

"Oh, if you can become smaller, you can easily dive into the water...

"Wait, get smaller?!"

Lin Yan was shaken all over, floating in the water, and slapped himself on the head violently.

"It's so stupid! I almost forgot that I still have a villain. You can send a villain to go deep and explore!"

The threat of the chaotic mist was so close that he was unknowingly confused.

Of course, his avatars still don't know the "Mixed Water Jue", so they need to be trained to learn it first.

Lin Yan didn't even get out of the water, so he picked out some of the original batch of brutal flame clones in the water, and trained them into "Mixed Water Jue".

Then, from the rock wall at the bottom of the lake, I dug out a small piece of rock the size of a finger, let each of the clones lie on one, and then went back to the cave I had been to just now, and threw ten clones down, Make them sink down the cave.

The doppelgängers are small in size and weak in physical strength, so it would take a lot of effort to let them swim down, and tie a stone directly to facilitate their rapid sinking.

"I hope that the bottom of this cave is not very deep, otherwise, the water pressure is too high, and I'm afraid it won't last long with the power weakened countless times by the avatar villain..."

Lin Yan counted the numbers silently while percepting. The avatar lying on the stone descended very quickly and kept sinking. The deeper he went, the greater the pressure on his strength.

After just three counts, Lin Yan felt that the pressure on the avatar villain was approaching the limit, and he had to work hard to resist it.

Count five more.

"Huh? The avatar has stopped descending, is it over?"

But in Lin Yan's perception, the doppelgänger villain didn't seem to be in the real place, and was still submerged in the water, but it did stop.

"puff"

In the next moment, the doppelgänger was crushed by the pressure of the water because he couldn't hold it up due to his strength.

However, Lin Yan didn't let all the ten clones sink to the bottom, but let a clone swim to the edge of the rock wall to catch every other count.

Although the avatars in the deep place were all crushed quickly, several of the avatars above survived for the time being, barely helping Lin Yan to detect part of the cave's structure.

"In the long section below, it is very narrow, there is no spacious..."

It is so narrow that it would take a lot of effort to dig through.

Lin Yan had no choice but to change another cave, concoct according to the law, and tried all the caves in succession.

Lin Yan found that each cave takes about 8 seconds, and the doppelgänger will be finished.

The bottom is not a stratum, it is still liquid, but it cannot sink.

Lin Yan was good at physics in his previous life. In 8 seconds, if the density of the stone is twice that of water, the acceleration of the descent becomes 150/[-] of the acceleration of gravity, and then multiplied by [-]/[-], and multiplied by the square of the time. It is concluded that the descending distance is about [-] meters.

Each Jijing cave is about 150 meters deep. It is possible that the bottom of these caves are all connected together.

It is a pity that the caves found are too narrow at the bottom, they are easy to block when dug, and it is not easy to sneak into them.

"The good news is that 150 meters is still within an acceptable range, as long as you find a suitable cave, you can barely dig it down.

"The bad news is, I still have to search the caves one by one!"

But using the avatar villain to explore is much more efficient than before.

There are at most a few hundred jade pillars underneath, and there may be a similar cave near each jade pillar.

He was going to put a few clones into each cave to have a look, and there was always one who could find a suitable path.

With such a plan, he immediately speeded up and swam towards the next jade pillar.

After walking a few jade pillars, it turns out that there are caves under each jade pillar.

only……

"This group of venomous-toothed trout is so annoying, aren't they afraid of death at all?"

Every time he approached a jade pillar, a large group of venomous-toothed trout rushed in. Although they did not pose any threat to him, they were extremely troublesome and took a lot of effort to kill.

If so many venomous-toothed trout are killed every time a jade pillar is passed, it is unknown when these hundreds of jade pillars will be finished.

Lin Yan actually didn't want to kill so many venomous-toothed trout. It is the natural enemy of the scorpion cockroach. Killing too many is equivalent to increasing the number of scorpion cockroaches in disguise. It may be troublesome to deal with.

However, if he didn't kill him, using Yufutu to defend would consume a lot of energy, and the gain would outweigh the loss.

Just walking a few jade pillars like this, just as Lin Yan became more and more irritable.

Suddenly, the water around Lin Yan rippled, as if there was a shallow shock, along the deep lake water, from far away, passing over his body.

Then the second, third time...

Something seemed to vibrate somewhere at the bottom of the lake, sending out layers of shallow ripples, which continued to spread outward.

The strange thing is that the ripples of the water passed by, and a large group of venomous trout that had rushed towards Lin Yan suddenly seemed to have lost their sense of direction, scurrying around and colliding with each other.

The ripples seem to be driving these venomous trout, and not only this place, but the venomous trout in the whole lake are affected.

Lin Yan turned to the end of the source of the ripples, with a serious look on his face. Could this be, as he guessed, the mysterious force that balances the ecology of the underground world?

However, at the next moment, Lin Yan's heart suddenly contracted, and his scalp was instantly icy cold.

An old, dying, low and strange voice suddenly rang in his ear.

"Come, come, come..."

　Thanks to book friend 20220612114805205 ​​for the reward of 500 coins, thank you!

　　
　
(End of this chapter)