A huge pit!

There was no end to see the super giant pit at the bottom that appeared on the plain, just in the coordinates of the North Pole, which was exactly the same. From a distance, due to angle issues, the giant pit formed an oval shadow on the horizon. The rock giant chasing behind him stopped a thousand meters away from the edge of the giant pit. It seemed that this was their forbidden area and he dared not come in.

The Federation slowed down and approached carefully toward the edge of the giant pit. Data was given on the armored screen. The edge of the giant pit was approximately a perfect circle with a diameter of more than 10,000 meters, reaching 10,103 meters!

Logically speaking, such a huge pit is very conspicuous from space, even if it is a warship radar or a reconnaissance satellite, it has scanned the planet's surface countless times, but it has not been discovered.

This phenomenon shocked everyone!

The Federation also has some similar optical stealth technologies that can create a simulated light force field and block the surveillance of orbital satellites, but the maximum range is only 100 meters, the energy consumption is very large, and the duration is at most dozens of hours. The diameter of this giant pit light in front of me is more than ten kilometers, and the duration is even more than that of the Federation. It seems to exist forever, and the technological level is unknown, which is far beyond the knowledge range of the Federation.

After a while, the team finally reached the edge of the huge pit.

Standing here, everyone felt like an ant standing next to a big pot, as small as dust, and extremely palpitations.

Everyone plucked up their courage to look down and saw a darkness. Only then did they realize that it was not a pit, but a huge hole that was bottomless. The entrance of the cave seemed to lead to the legendary hell, and a wisp of air flow blew up from the bottom, which was creepy, and it felt even more terrifying than standing on a cliff in a deep abyss. Even the dark space was not so terrifying.

Xin Ji squatted down and reached out to touch the inner wall of the giant hole. It was smooth and hard, shaped like glass. This is a solid substance formed by the soil after being roasted by high temperatures, but the temperature is much lower than the average temperature of the planet, only about ten degrees, and it feels cold to the touch.

The angle of the inner wall is perpendicular to the ground and points directly to the center of the planet, but the armored range-measuring radar waves go and go without returning after entering the giant cave, and should be absorbed by some material.

In this way, there is no way to detect the depth of the huge hole.

Xin Ji looked up at the opposite side of the giant cave. Without the assistance of the armored light brain, he could not even see the edge of the opposite side with his eyesight. He couldn't help but be amazed. How could such a huge artificial fortification be created? Where did the dug out soil and rocks go?

"When the first two stellar energy burst, the energy gathered over the North Pole and then disappeared."

Qi Ying said with a serious expression: "Now it seems that my guess is right. The energy of the star is input into the planet from this cave entrance, and the ruins of super civilization should be hidden below."

Everyone nodded slightly. This was obvious, but this huge hole felt too terrible. If you break in, you might not have a good ending.

At this time, a piece of warship fragment of hundreds of tons mass fell from the sky and fell into the hole.

The fragments rubbed and heated, dragging the long tail flames, like torches illuminating the interior of the giant cave. Soon after it fell, it hit the glass-shaped inner wall, sending back a violent explosion, and then continued to fall. The light gradually weakened and finally submerged into the darkness. Even the sound of the impact could not be heard, and it was obviously far from bottom.

"My God, how deep is this hole?" Some mercenaries shouted in groans with fear on their faces.

Zhuang Xiaolin broke the silence and said resolutely: "Let's go down."

"Ah?" the mercenaries looked at each other and asked in fear: "Captain, do you really want to go down?" Everyone was a little resistant. The feeling of this huge hole was really bad.

"What can I do if I can't go down? Do you have a way to return to space?"

Zhuang Xiaolin asked back, looking into the distance. At this time, fighting was everywhere within a few hundred kilometers near the North Pole, and it was boiling. He said: "We are desperate now. The steel-bed orcs will soon gather. They are numerous, and even if we don't enter, we will be dead."

This is a question of choosing one of two.

If you don’t enter the giant cave, you have to face the army of the steel-bed orcs. If you go in, you may be able to solve the mystery of the ruins of super civilization and find a way to leave the planet.

Even if there were unknown dangers, everyone quickly reached an agreement and went in!

Zhuang Xiaolin took a deep breath, stepped out from the edge of the hole, and fell straight down. At the same time, the armored flight engine was turned on, slowing down. He flew down more than a hundred meters without any accidents, at least temporarily safe. Others also jumped into the hole, opened a certain height distance, and fell down close to the inner wall.

At the beginning, everyone controlled the falling speed to about fifty meters per second, and didn't dare to be too fast. The light in the cave was still very bright and could see clearly between each other.

After a few minutes, I had already penetrated more than ten kilometers below, and the surroundings gradually became darker. The whole picture could be seen at the entrance of the cave above my head. Looking back, I could vaguely see the sky outside the cave, just like watching the sky at the bottom of a well in the literal sense.

If it were on the earth, this depth had exceeded the thickness of the crust. When it entered the mantle layer, the density increased sharply, the temperature soared, and was filled with high-temperature solid fluids. However, the temperature in the cave was still only a dozen degrees, the inner wall was cold and there was no sign of deformation at all, which completely violated geographical common sense and was puzzling.

Not to mention, the bottom is still bottomless.

“Start up!”

Zhuang Xiaolin shouted, adjusting his posture to change to head and feet, and the flight engine sprays out the tail flame, and the speed suddenly increases to 200 meters per second, and everyone quickly accelerates to follow.

The light from the cave entrance above became dimmer and darker, and even the cave entrance slowly shrank in view. At first, it looked as big as a full moon. After a few minutes, when everyone went deep into the cave a hundred kilometers deep, the cave entrance had become only the size of a cup lid, and most of the light could not reach here, and there was darkness around it.

Ten minutes later, the entrance of the cave was only as big as a coin in his eyes. At this time, it had already penetrated more than 200 kilometers. He could not see his five fingers, but he still did not reach the end.

Zhuang Xiaolin accelerated again, and the team's falling speed was close to subsonic speed.

As they went deeper and deeper, everyone in the federal government felt distressed. If there were claustrophobia patients here, they would have been scared to death.

"Does this huge hole really lead to the center of the earth?" someone couldn't help asking.

No one can answer this question.

It has been falling and flying for more than twenty minutes. The light brain inside the armor shows that everyone is at a depth of 300 kilometers underground at this moment. The diameter of this planet is about 5,000 kilometers. It continues to fly at this speed. It can reach the core center of the planet in just over two hours.

This is simply unimaginable!

If it is on Earth or other Earth-like planets, the depth position should be liquid molten substance, the temperature and density are too high to bear, and the pressure is even more estimable. However, the inside of this giant hole still has no change, straight up and down, the diameter is always accurate 10,103 meters, and the temperature is maintained at more than ten degrees. It seems that an invisible force field maintains this state and ensures that the inner wall is intact.

Xin Ji had already used telepathy to explore the inner wall, but found nothing. The inner wall looked like ordinary soil and rocks, burned into glass at high temperatures, with a thickness of at least 300 meters, exceeding his sensing range, so it is impossible to know if there is a mantle structure behind the inner wall.

Because it gets closer and closer to the core of the earth, that is, the center of mass of the planet, even the gravity felt has become smaller and has been weakened by about one-eighth.

During a irritating silence, everyone continued to fall rapidly and the gravity was slowly decreasing.

Gradually, a dim spot of light appeared in front of him.

"Look!"

The mercenaries shouted, all of whom were full of energy. The light appeared to indicate that it was coming soon.

Everyone couldn't help but speed up, breaking through the speed of sound, and moving towards the light spot. The light spot slowly expanded in the field of view, initially just a spot as big as a finger. After a few minutes, as the distance narrowed, the light spot was as big as a disc, and it continued to grow, gradually revealing its true appearance.

This is a circular plane with a diameter of 10,000 meters. The whole body is made of some kind of light golden metal. It is carved with an eye. This eye is 90% similar to humans. It is flat on top and bottom. The corners of the eyes on both sides are connected to the edge of the plane. It is 10,000 meters long. In the middle is a red pupil, which is lifelike.

The diameter of the pupil is three thousand meters, as if it is composed of condensed red energy. At first glance, it looks like a star!

Everyone in the fallen Federation was shocked. Somehow, looking at this eye from afar, everyone felt inexplicable palpitations in their hearts, as if this eye was alive, with pupils able to rotate, and they were looking at themselves.

As the distance gets closer, the eye is rapidly enlarged in front of you, giving people a more terrifying feeling.

After a while, we finally reached the bottom of the giant cave, and the speed slowed down and floated in the air five kilometers away from our eyes. The light brain showed that everyone fell 700 kilometers in the giant cave, which means that this place is located at a depth of 700 kilometers underground, and even the gravity is only two-thirds of the ground!

Looking back at the entrance of the cave from here, it was dark and could no longer be seen.

Everyone was looking down at the platform below in surprise, especially the huge eye. After getting closer, they found that the pupil in the middle was actually a complete red crystal, translucent, and the energy inside could be vaguely seen flowing, looking like a star in continuous fusion, dazzling and magical. Most of the light here emitted from the pupils, illuminating the bottom of the huge hole.

The lines depicted as eyes are ravines that are 100 meters deep. There is nothing else outside the eyes, just an empty square.

After observing from a distance for more than ten minutes, no useful information was found in various detection methods. Whether it was the light golden square or the pupil crystal, it was unprecedented and unknown what it was.

This is obviously a building ruin suspected to be left by the super civilization, but when things come to an end, everyone is scared and no one dares to land and contact.

Everyone remembered clearly that before they came down, a piece of warship weighing hundreds of tons fell in.

However, no debris were found in the metal square within a radius of ten thousand meters. Even if it melted and disintegrated, a little residue should be left behind. However, let alone residue, it could not even be found in dust. The hundreds of tons of material disappeared without a trace, which was absolutely strange.

"What is this square and this eye? What is it for?"

Everyone was curious, but they were helpless. All the detection methods carried by the armor were useless here, and the things in front of them were far beyond common sense, and they had no clue even to guess.

"Go closer and take a look."

The three generals and warlocks quickly made a decision to control the armor to fall slowly. The metal square became larger and larger in view and could not see the whole picture. It stopped until it was only a hundred meters away from the square.

At this height, it can be judged by the naked eye that the circular square with a diameter of ten kilometers is indeed cast of some unknown metal. The huge red crystal looks like it contains extremely high heat, but in fact it is not hot at all. The closer it is to it, the lower the temperature, and it seems to absorb all the heat around it.

“Absorb heat?”

Xin Ji's heart moved, remembering that when Qi Ying said that when the energy of a star bursts out, the energy is input from the hole and then disappears. Could it be that it was absorbed by this crystal?

What a terrible huge energy that would be if six stars exploded at the same time, enough to melt the entire planet's surface. This crystal can actually absorb it in full, and it will happen every 53 days!

“This should be an energy harvesting device.”

Xin Ji secretly guessed, but after the energy was collected, where was it sent? Is the bottom of this crystal connected to other structures? What I saw in front of me was the tip of the iceberg. Will the larger artificial buildings be hidden deep in the ground?

Not only him, but others' speculation is almost the same.

Zhuang Xiaolin shouted: "Everything is spread out. Look for any passages or entrances everywhere. Pay attention to maintaining the height. Don't go down and contact the ground of the square for the time being."

"good."

Everyone immediately scattered around and searched in the air.

Xin Ji flew casually in one direction, and telepathically integrated beams downwards. As expected, the metal ground of the square was completely dense, with no gaps inside to drill, and the thickness of the ground exceeded the range of telepathy and could not penetrate into the underground space.

But it wasn't all that he had no results, he soon made a small discovery.

The edge of the square is perpendicular to the inner wall of the giant cave. There is a gap in the connection between the two, and telepathy can easily penetrate it. Although no special things were found, it confirmed the previous speculation that the square is far more than 10,000 meters in diameter. It is unknown how big it is. It is hidden behind the inner wall and extends out.

The group of people searched several times, and found nothing else. They gathered together for a long time to discuss, but there was no result.

Finally, several strong men decided to send people down to get in close contact with the square.

A Zhuang Xiaolin's absolute confidant mercenary stood up, and in everyone's eyes, he slowly landed. Just as his feet were about to touch the ground, the eye in the middle of the square burst out with dazzling red light, instantly submerging everyone in the air.

The light contains unbearable traction, which makes people unable to move, just like an insect in amber, watching him being sucked into a light gate that was generated at some point. His eyes turned dark and he could no longer sense anything.

"I won't die like this, right?" This was the only thought in Xin Ji's mind.rw
Chapter completed!