A large square hole with an area of ​​about one hundred square meters appeared in front of everyone.

Su Lisen looked down, it was very deep.

"It's too dark down there, so I can't see exactly how deep it is."

Long Ju turned on the intercom of his helmet, and the roar was so loud that many people's ears were buzzing and they almost went deaf.

"Big man, keep your voice down."

He Yu De Fang and Chu Han scolded each other angrily, then glared at each other, and turned away together, not wanting to see each other's disgust.

These two guys are bound to cause some trouble when they come together.

"Get out of the way, let me try."

Qu Shan stepped forward, separated the two idiots with his body, took out a lighting rod from his backpack, twisted it off with a 'click', and waited until the two types of reaction solutions contained inside mixed to produce fluorescence, then threw it down.

In the collapsed gravel cave...

The luminous response of the lighting rod became stronger and stronger as time went on. After falling for a few seconds, it landed on a raised stone platform, illuminating a space of about thirty or forty meters in radius there.

"About ten feet."

Qu Shan was accustomed to the old-style measurement units and said suspiciously: "It seems that the boss is still some distance from the bottom. I didn't see them."

"Let my people go down and investigate."

Chu Yang stood out from the crowd and stretched out his hand to say hello.

More than a dozen soldiers from the Corpse Transformation Battalion immediately came forward. At the entrance of the cave, they connected the ropes woven with the corpse belts that were originally intended to be lowered to the bottom of the canyon cliff into a 100-meter-long rope. They used fixed steel wedges to secure the ropes.

Nail one end to the edge.

They rappelled down quickly, but didn't see any movement for a long time.

Chu Yang anxiously shouted on the public channel, but received no response.

He was about to go down in person, and as soon as he grabbed the rope, he felt a tight and pulling force from the rope.

"Um?"

Chu Yang closed his eyes and felt it for a long time before saying, "I seem to have discovered something underneath."

I looked at Su Lisen, Long Ju, Heyu Defang and the others, their eyes seemed to ask - can you go down?

He didn't wait for Su Lisen and the others to give an answer, and then he went downhill on his own...

Su Lisen and the others looked at each other. Long Ju was the most eager and followed down first. Su Lisen, Ling Yun and Qu Shan had no choice but to grab the rope and slide down.

Su Lisen silently calculated that the depth of the cave entrance was more than fifty meters.

When he reached the bottom and stepped on the ground, he also used a scarce lighting rod.

As the light gets stronger, the space underneath becomes more clearly visible to everyone.

"Wow!"

After He Yu De Fang, Chu Han and others followed down, they were shocked by the scene in this space.

"This feels a bit familiar."

Su Lisen, Ling Yun and others exchanged glances. It was obviously a man-made underground building underneath. It was somewhat similar in style to the stone hall and underground palace of the Temple of War, but it looked much older.

"They're here...ugh!"

Those who fell from a height of fifty or sixty were probably 'caught' and cushioned by several ledges on the cave wall. There were also five or six people who only broke a few bones in their bodies, and the rest of them fainted.

A familiar soldier from the Third Pioneer Battalion stepped forward to rescue him.

The rest of the people took out the lighting tools they carried, spread out, and carefully searched and explored the environment below...

He Yu De Fang and He Jie had many people in their animal transformation camp, and they brought the most portable star energy equipment. They installed a set of lighting circuits directly underneath, and a star energy battery was connected to hundreds of stars the size of fingernails.

Emergency lighting can illuminate this underground space in every detail.

There are seven criss-crossing straight and spacious passages underneath, dividing this large fan-shaped area into eight small fan blade areas.

Each small fan blade area has different areas. The largest ones are the two fans in the center, both exceeding 10,000 square meters. The smallest ones are the fan sections on both sides, which also cover an area of ​​more than 300 square meters.

Except for the deep hole that collapsed when they came in, the rest of the space was nearly ten meters high. When they stood in the corridor that was more than ten meters wide, they all felt extremely empty.

"It seems like this is some kind of secret vault, treasure house or something like that."

Chu Xi looked very experienced and glared at He Yu De Fang before asking Chu Xiao: "Brother Xiao, we didn't accidentally discover a treasure, right?"

After being 'reminded' by him, many people temporarily forgot that they were in a strange environment and became energetic.

"Buzz buzz..."

At this moment, a small wooden box in Su Lisen's pocket began to vibrate violently.

Under the curious stares of Ling Yun, Qu Shan, and Long Ju, Su Lisen took out the small wooden box and opened the lid. The magical 'Mattis Civilization (Star Navigation) Key' inside suddenly shined brightly...

"hiss!"

Many people were blinded for a moment, and it took a long time for their vision to return to normal.

When I looked again, the 'key' had turned into a small ball of bright blue electric light, with countless tiny electric lights flashing freely on its surface, like some unknown text symbol.

There was a "click" sound, and the eight sectors trembled slightly, as if some mysterious mechanism was triggered after being illuminated by the blue runes of this small electric ball.

Immediately after a dull trembling sound of 'rumbling', everyone barely managed to maintain their body balance, and then they suddenly discovered that the 'partition walls' of the eight sectors had sunk in, revealing a vast and empty underground space.

After this change, only thousands of large transparent pillars flashing with blue electric light remained in the middle area. The electric light inside was bright, and tall figures could be vaguely seen inside. Standing quietly among them, there was a scalp-numbing feeling.

A sense of mystery filled the minds of everyone present.

"Yes, there is someone!!!"

A few guys who were not very smart screamed in surprise.

"Su Jue, what, what's going on?"

Chu Yang, He Yu De Fang, He Wei, Chu Han, Chu Xiao, Split Star and others were standing together quietly at this time, as if they were "hugging together" to exert pressure.

But the trembling in their voices made them feel particularly unsure.

"Well, I seem to understand what's going on."

Ling Yun and Qu Shan stood up, protected Su Lisen behind them, and looked at He Yu Defang, "Earl, you should know."

"What?"

Heyu Defang was shocked, then woke up and shouted: "Mattis extraterrestrial civilization?!... Woo!"

Then he wanted to cover his mouth, but the broken mouth had already revealed the secret, so he patted his own mouth angrily.

"What kind of civilization is that?"

Chu Chen's eyes were shining, "So, there really is a treasure underneath?!"

"What's your size?"

He Yu Defang rolled his eyes at him and said, "Even if there is, can you successfully retrieve the treasure? The six-star old ghost from the city-split happens to be outside. Ask him if he agrees to own it for you?!"

"Well!"

Chu Han's face turned dark immediately, "So what? If any of you can crack the signal shield here, do it quickly. When the young master I contact the family and call for reinforcements, I will definitely make the old ghost look good."

"You're talking nonsense!"

Heha Defang confronted him and scolded him angrily, "Even if we can crack it, when your reinforcements arrive, maybe the old ghost will find our location..."

His mouth was also open and a good one. As soon as he finished speaking, there was a violent explosion and vibration at the entrance of the hole above, and a large amount of gravel and dust poured in, almost killing him.

They were buried alive underneath.

When everything stopped and became quiet, they discovered that they were less than five meters away from the thousands of tall and strong blue electric light pillars, and could clearly feel the strong energy of their electric light.

For a while, no one dared to act rashly.

"Chichi..."

"ah!"

Chu Chen was the meanest fellow. He couldn't help but throw a dagger at the blue electric light beam. It was instantly hit by the free electric light and reflected back. If it weren't for Chu Xiao and Split Star's quick hands, they might have been ejected.

The dagger that came back struck me, and I was so frightened that I screamed, almost peeing my pants.

"puff……"

Su Lisen, Long Ju, Ling Yun, Qu Shan, He Yu Defang, Chu Yang and others couldn't help laughing.

But at this moment, after a "buzzing" blue electric light flashed and died out, the light beam dimmed and immediately split in the middle, revealing a mechanical armor more than ten meters high.

Everyone was stunned, thinking that Chu Han was about to suffer disaster, when suddenly, a blue light shot from somewhere in the group of blue electric light pillars.

After a soft "chichi" sound, the mechanical armor of more than ten meters shrank to a shape of more than two meters high.

"Extraterrestrial civilization, black technology?!"
Chapter completed!