Deep at the bottom of the lake, the huge eyeballs and the constant fluttering nerve bundles around them gave everyone present a very strong sense of threat. At first, Onno still didn't see the source of the attack, as the nerve bundles were just meaninglessly swinging, and only when Onno and the three camouflage soldiers fired their weapons would they gather together to defend.

Suddenly, the shield on Onno's body suddenly lit up, and a very small point of light hit Onno's shield! More points of light then appeared on Onno's shield. Ono glanced at his shield capacity and saw that it was slowly and orderly descending. And Ya tested it, but he didn't find anything attacking Ono himself! Just as a spot of light appeared outside the shield of Onno, a large number of bubbles appeared on the armor of the other three camouflage soldiers!

The bubbles seemed to make the three camouflage soldiers boil around them, and they bubbled as if they were soaked in a carbonated drink. Soon, the three soldiers reported to Onno that the strength of their armor was rapidly decreasing, and that the bubbles and things that produced bubbles were constantly destroying the armor that could repair itself!

Hearing the soldier's report, Onno immediately asked Ya to scan it again, but this time it was the armor on the three soldiers! Ya immediately started the scanning device, but as soon as she opened the scanning results, she found that the situation was very wrong! Around the bodies of the three camouflage soldiers, a very unique microorganism that is almost invisible to the naked eye is frantically devouring the outer armor!

Although these microorganisms are extremely small, their numbers are quite large, and such a number triggers a qualitative change, and the extremely hard armor becomes a thin layer of paper, and under the threat of water pressure and microorganisms, the soldiers inside will soon be crushed into a useless pile and swallowed by those microorganisms!

As for Ounok's side, the energy shield on his body allows those microbes to rely on the number of their own deaths to consume the shield capacity frantically! As for the armor on O'Nuo's body, the strength is similar to that of those camouflage soldiers, and it can't resist the invasion of these microorganisms at all.

"Boom!" Onno attacked with another sonic weapon, and a white line went straight to the huge eyeball, only to be intercepted by the tentacle-like nerve bundles once again. The strength of the armor on the three camouflage soldiers had dropped by 50% by this time, and Onno wanted to order the soldiers to retreat, but when they were about to leave upward, they found that the nerve bundles had unwittingly pressed the camouflage soldiers' feet into the mud and sand at the bottom of the lake.

In the distance, the mermaids who kept swimming were also frantically dodging the attacks of the giant eyeballs, and as the giant eyeballs continued to attack, its entire body was falling towards the huge hole, not knowing what to do! It's just that when this qualified giant eyeball descended to a certain extent, it was suddenly intercepted by something at the mouth of the pit!

It was a humanoid object that had not been observed before, and the two humanoid objects had burly statures, and each of them held two rather long tridents in their hands to intercept the eyeball monster. The mermaids, who were terrified and hiding, stopped where they were after spotting the two burly statues.

Then the mermaids rushed in front of Onno and the three camouflage soldiers at great speed, and the hair on their heads suddenly stretched out and wrapped them all! Ang Nuo and the others, who didn't understand the behavior of these mermaids, didn't dare to act rashly at this time, allowing these beautiful mermaids to hold them in their arms and let those microorganisms devour their bodies and hair.

The mermaids took Onno and the others and began to swim frantically towards the mouth of the pit, they seemed to be affected by the two burly statues, and became quite brave and fearless!

Wrapped in his hair, Onno could only feel himself being thrown out by a huge force! When he could see what was in front of him again, he found himself beneath the eyeball creature, in the hole! Under the lights, the creatures of the monsters in the pit come to life! The huge eyeballs on the top of his head stretched out several nerve bundles, trying to stop Onno and the others, but they were intercepted by the mermaids.

Immediately after, the weapons in the hands of the two burly statues changed from the color of stone to the color of gold, and those mermaids also underwent magical changes, quickly gathered together, countless strands of hair grew rapidly, and fought with the nerve bundle of the giant eyeball!

Looking at the fantastic and strange battle at the entrance of the cave, Onno understood that things could not be delayed, and immediately ordered the camouflage soldiers whose armor had been repaired to three-quarters and began to move deeper! Ono also took one last look at the mermaids who were still fighting, and quickly dived into this huge hole!

The crater had been detected to a depth of about 100 meters before, and the speed of everyone was very fast, and they had reached the bottom of the pit in less than a minute. When they came out of the pit, Onno was stunned by what he saw! What appeared in front of him was a very huge modern city!

Countless tall buildings and mountains were erected one after another, and some of them had words written on them that Onno couldn't read. There are still a lot of abandoned vehicles in the streets of this city! It's just that when Onno led the camouflage soldiers down and was intercepted by a layer of transparency, he realized that the city at the bottom of the lake was not flooded by the lake!

This layer of transparent stuff was only clearly discovered after Onno came into contact with it! The concealment of this thing is even beyond Ya's detection range! And when this transparent thing was discovered, the city in front of Onno suddenly disappeared, and this transparent forehead immediately obscured everything inside. It's just that under Ya's scanning, the entrance to this huge lake-bottom city was discovered!

It was a huge passage, and the place where the passage led looked like it was supposed to lead to another city, but now this passage had been broken in two, leaving a place for the entrance to the completely closed city! With Ya's scan, Onno immediately led three camouflage soldiers into the destroyed passage.

This damaged passage is actually very short, at the end of the passage is a rather huge airlock door, Ya's detection shows that the thickness of this door is more than ten meters thick, it is completely foolish to want to open it, next to this huge airlock door, there is a small mountain of more than one meter thick airlock door, this is the place where everyone wants to pass.

But the only problem now is that opening the airlock gate will inevitably allow a large amount of water from the lake to enter the city, which is quite a serious obstacle to their movement. How do I get through the airlock? A camouflage soldier stepped forward, he silently took out the two parts inside his armor, and after a quick assembly, something the size of a small airlock appeared in front of Ono's eyes!

When Ono saw this thing, he wanted to ask curiously what it was, but he saw that the camouflage soldier had attached this thing to the small airlock door and activated it to fill the lake! Then the soldier said angrily in the language of Onno, which he had just learned: "This, reverse airlock!" Get inside, open the airlock door, and defend against the backflow of the lake! ”

When Ono heard the soldier's description, his eyes lit up, so that he could easily enter the small airlock and finally enter the sub-city. After the reverse airlock door was installed and fixed by the soldiers, Onno and the others entered the reverse airlock door. When everyone entered, they only heard a buzzing sound, and the lake around them quickly receded! The white soft film on the outer layer of the reverse airlock door looks soft but can resist the huge water pressure, smoothly opening up an open space without seawater for everyone.

"Squeak!" The small airlock door was forcibly opened by Onno and the others with brute force, and there was darkness behind the door, and the light swept through a long corridor! And in this corridor, black ashes like snowflakes are scattered everywhere! When Onno picked up one of the ashes, Jean analyzed them, and found that the ashes were the remains of a combustible wood product, and a very strange text symbol "衤" remained on it.

As far as the others could see, there were a large number of vehicles on this long corridor, and these streamlined vehicles all left a large number of traces of flames on the shell. In several of these vehicles, Unnor and the others saw the remains of a life form that was completely different from that of humans! This organism has a human-like body, except that it has a pair of arms and an extra eye on its head.

These poor beings could not escape this place until they died, and they were devoured alive by the flames, and everything they had once was submerged in the deep bottom of the lake. It's just that when Onno saw these things and found that the history of these things was thousands of years old, a question suddenly appeared in Onno's mind.

Why was this civilization of four-handed, three-eyed beings never discovered by the Cosmic Watchtower? Judging from the ruins discovered by Onno and others, the level of this civilization has reached a certain stage in the development of ancient humans, and what happens if it is suddenly destroyed?

Aung Nuo submitted his questions to Ya, who was silent for a while and responded to Aung Nuo that there were no such things in her database, and she didn't know what was going on, and that it was only possible to know what was going on after all the data inside the Cosmic Watchtower was repaired.

Onno nodded, knowing that this was the only way. Thinking of this, he turned around and ordered the three camouflage soldiers who were curious to look around to continue on their way, keeping their guard. After all, this may be the first "outsider" to come to this place in thousands of years! ……