In middle age, one's comprehension becomes extraordinary.

Li Yuan doesn't have trypophobia, but at this moment, he was covered in goosebumps.

One rock bear is already so difficult to handle, let alone over a hundred...

The rock bear demon fell into the middle of the pit.

A moment later, the rock bear demons below all raised their heads and looked at Li Yuan and Xia Yao.

These rock bear demons below are clearly somewhat strange.

They move slowly, and some even seem mentally challenged.

But no matter what, this is still a Rock Bear Demon!

Li Yuan's gaze swept around, and on the wall of the pit, there seemed to be... a door!

The rock bear demon below began to turn red in the eyes, and then it gathered its strength and rose up.

Seeing this, Li Yuan immediately grabbed Xia Yao and led her through the door.

There was a slide at the entrance, and the two of them slid down it.

Behind the two, Deputy Battalion Commander Fang and his men followed closely, arriving in just a few minutes at most.

But Li Yuan and Xia Yao didn't have that much time to wait for their rescue.

Even if they come, they might not be able to save him...

The two glided for quite a distance before landing in a room.

A heavy gate suddenly descended from the slide behind them.

"Don't try to break the swan's cast-iron gate with external force."

Xia Yao, who was standing to the side, looked at the gate and spoke up.

Swan cast iron is not a particularly strong material, nor is it so powerful as to withstand a master's attack.

The use of swan-cast iron is a way of telling others not to attack the door, as it has a hidden mechanism.

If you attack indiscriminately, even if the door opens, people will die.

The two took out their flashlights to provide light and calmed themselves down for the time being.

This door not only prevented the two people from leaving, but also kept the ferocious beast from entering.

With the help of a power supply, the entire scene inside the room could be seen.

This place is clearly a laboratory. Although no core documents have been left, the relevant experimental equipment is still there, and there are related diagrams on the wall.

"The Rock Bear Demon... was it created in a laboratory...?"

Xia Yao looked at the picture on the wall, her voice trembling.

The current situation has the implication of a reshaping of worldviews.

This ferocious rock bear demon has taken countless lives.

So, did it originate from a human laboratory?

Along with this feeling came the awareness of danger.

What kind of power could produce all this? Will the two of them even be able to get out?

Li Yuan felt the same way when he saw this scene.

This, combined with the many A-level ferocious beasts we just saw, seems to further confirm this point.

How could so many of these mutated and enhanced ferocious beasts appear at once?

Even if the Rock Bear Demons mate and reproduce, the genetic expression of their offspring should not be so uniform.

The two suppressed the flood of questions that welled up in their minds.

Holding a flashlight, they continued their examination of the laboratory, searching for clues and looking for a way out.

At the same time, Deputy Battalion Commander Fang also arrived.

Looking at the pit in front of him, a hint of doubt flashed across his face.

As the deputy camp commander of Sunset Mountain Camp, he had no idea there was a pit here!

I walked to the edge and looked down.

The next moment, Deputy Battalion Commander Fang felt his scalp tingle and goosebumps rise all over his body.

Below, beast heads surged, all of them Rock Bear Demons...

He began to move quietly, quickly retreating, and then rapidly making hand gestures.

Order the main force that followed to retreat, and do so silently.

The group of martial artists who had caught up with them were also unaware of the situation.

Since the deputy battalion commander made such an arrangement, they naturally had to obey.

Everyone tiptoed back.

After retreating three or four hundred meters, Deputy Battalion Commander Fang looked back and saw that no ferocious beasts were chasing them.

He breathed a slight sigh of relief, then ordered everyone to return to the camp, which was then placed on the highest alert level.

The others didn't know the reason, but judging from Deputy Battalion Commander Fang's expression, they knew something serious had happened.

Everyone quickly returned, and Cui Xuan, who wanted to go find Xia Yao, was also stopped and sent back.

On the way back to the camp, Deputy Battalion Commander Fang was already making phone calls to inform his superiors.

What just happened was beyond his control.

Deputy Battalion Commander Fang reported to his superiors that he requested at least three grandmasters be sent.

There were over a hundred of those swarming rock bear demons.

According to Deputy Battalion Commander Fang, three grandmasters are probably not enough.

However, there are always other people following the master.

Whether they are ninth-rank or eighth-rank martial artists, they can be of great help.

Deputy Battalion Commander Fang returned to his tent and took out the video recorder he was carrying.

He looked at it again; it contained a record of that scene.

For a moment, Deputy Battalion Commander Fang even doubted that he had seen wrong.

The recorded video brought him back to reality.

Soon, the relevant video was also sent to the brigade headquarters.

Seeing the densely packed Rock Bear Demons, the decision-makers acted much more swiftly.

The four powerful masters who lived nearby immediately set off for Sunset Mountain camp.

So many A-level ferocious beasts, if they were to be deployed simultaneously, could easily annihilate a city!

Trapped in the laboratory, Li Yuan and Xia Yao are now deducing the situation based on the clues they have gathered.

First, there was the pit. Li Yuan guessed why a pit had suddenly appeared.

The appearance of this pit was actually an accident.

The person who started all this didn't intend to expose so many Rock Bear Demons.

He hid all these things underground.

Who knew that the ground would collapse, exposing everything hidden underground to the public?

In just over two hours, Li Yuan and Xia Yao had finished looking through the entire laboratory.

There are two more rooms ahead, forming a large experimental area.

"The entrances and exits are all gates made of swan-cast iron."

Without the key, forcibly breaking open the gate will most likely trigger the mechanism behind it.

Given the importance of this place, once the mechanism is triggered, this entire area will be razed to the ground.

Not only will we not survive, but the evidence here will also be completely destroyed.

Xia Yao frowned deeply. As a descendant of the Xia family, she was well-informed and experienced.

She thoroughly understood the principles behind Swan Cast Iron and related topics.

Even understanding these principles, it would still be difficult for the two of them to get out.

Deputy Battalion Commander Fang and his men have found this place, but they don't have the key. How are they going to open this swan-shaped cast iron gate?

Need a locksmith?

Yes, but it has to be a master craftsman with the world's top skills, because this is an extremely high-precision lock.

If you make a mistake, you'll trigger the mechanism.

"A locksmith might have a chance to open this kind of door from the inside."

The success rate will only be lower outside.

Xia Yao spoke softly, but her tone was clearly pessimistic.

We can't get out; even if reinforcements arrive, we still won't be able to get out...

Two people will be trapped here and die.

Unless the owner of the laboratory returns.

But if what he did were discovered, why would he walk right into a trap?

At the same time, Li Yuan began to observe the structure of the lock.

Most locks work on roughly the same principle.

However, the level of detail varies greatly.

The more detailed the information, the more nodes need to be opened.

On the key, you can also see that the corresponding turning points become more numerous and complex.

"The swan-cast iron gate, if opened carelessly, will trigger the corresponding mechanism..."

Seeing Li Yuan's futile efforts, Xia Yao couldn't help but speak up.