I glanced behind me, and behind me was a stone wall, and there was no way in sight.

"Strange, where the hell am I?"

I shouted behind me, calling Zhang Ji's name.

"I'm here."

His voice whispered to me through the stone walls.

"You don't move there, wait for me."

I immediately turned around and quickly touched the stone wall.

The next second, I was empty, and I fell headlong on the other side.

I happened to be planted at the feet of a person, and Zhang Jizheng looked at me with a stunned face.

"How did you do that? Suddenly disappearing, and suddenly appearing? ”

I shook my head and pointed to the wall behind me.

"It's empty, there's no real wall, you can walk through it from here."

After saying that, I picked up Zhang Ji and quickly walked through the stone wall, and came to the other side again.

Zhang Ji looked at me incredulously, reached out and touched the stone wall, and quickly passed through.

"Oh my God, what is this? Why does it look like there is a wall in this place, but this place is empty? ”

I shook my head at the walls around this.

"I think it's likely that the people who set it up here created an illusion for us here through the light or something."

With that, I walked around the wall and took a circle.

I soon found a prism on the ground.

When I took it away, there were obvious mottled ripples on the wall in front of me, and it seemed as if a piece of the wall was empty.

Zhang Ji was even more incredible, and couldn't help but grab another half a point there.

"Oh my God, can you achieve this effect?"

I nodded, then pointed to the hole in the wall and said to him.

"Look here, there's dust floating up from around the walls on both sides, and I think these things are very similar to projectors. They used the dust as a screen to project projections of some of the walls, and it was the prism in my hand that intervened. ”

I picked up the prism, which was polished with a special jade, and the surface was extremely smooth, refracting and reflecting like a real mirror.

I looked at the empty caverns around me.

"And I don't think there's just one mechanism here, there must be other ones hiding in the shadows, waiting for us to find out."

I clutched the prism in my hand and put it in my backpack.

"Let's go first, we don't have time to continue looking here, at least we leave a vacancy here, and when we can't find our way, we can turn back and find here."

Zhang Ji nodded at me, immediately followed my footsteps and walked forward.

I knocked on the stone wall, and Wang Wangyang on it began to move forward again.

I immediately followed.

It's the same place as before, and the footsteps are constantly ringing from under our feet, helping us to guide us in the right direction.

But soon, the footsteps stopped.

Immediately after, there was a faint call from under my feet.

I immediately lay on the ground and listened carefully to the voices below.

"We've come to the end, there's no way out, there's no way to continue to show you the way."

They don't know what's going on on our side yet.

Presumably, they have also experienced the same situation as us, seemingly reaching a dead end, but in fact they have another way to live.

After deciding to go with them, I took the nail off the wall, and then I took out the nail again, simply nailed it to the wall and continued to climb down.

When I was on the top wall again, I immediately raised my voice and carefully told the two of them what we had just discovered.

Soon, the voices of surprise from both of them could be heard from under our feet.

"In other words, the walls around us have a way out, right?"

I nodded, quickly pulled out a nail, and aimed it at the zenith in front of us.

"Wait, I'll throw you a nail, and you listen to the sound to tell the way and see if you can find the corresponding exit."

I aimed a nail at the ceiling in front of me and smashed it against that piece.

Bang.

There was a loud bang from the ceiling.

Obviously, the two people above seem to have heard us too.

They immediately replied in a panic.

"We see, just behind one of our walls, there was a distinct sound, is that in this direction?"

Immediately afterward, the two of them were silent.

But I could clearly hear their footsteps and continue on my way, and soon went down the passage we had taken.

I understood everything here.

To be precise, if a person enters this place, then he can only wait for death.

If it is two people, who happen to be divided into two layers, then they can use each other's footsteps and sounds to pass through this passage.

And you can only communicate with walls and floors.

The confusion here is too strong, and if ordinary people can't discover the secrets here, they will be trapped and die directly under the ground.

There is no way to survive at all.

I jumped off the wall, removed the nail and immediately followed the sound of my footsteps.

Zhang Ji also hurriedly followed.

The two of us continued to follow the footsteps above and walked down the passage.

It was a passage that we had never been to before, and when we looked up through it, we could clearly see footprints and handprints on the ceiling.

"It seems that we are still in danger."

I finally knew why the footprints and handprints had suddenly disappeared.

Most likely, we entered these spaces that we can't see at all, and then this ghost thing is hiding here.

And now, I don't know where the guy above us is hiding in a corner.

"Zhang Ji, you have to be careful no matter what, you must be careful on the top of our heads."

I instructed Zhang Ji and continued to walk forward cautiously.

The current situation is very special and we must not take it lightly.

Zhang Ji nodded at me, followed me cautiously, and walked forward silently.

The two of us quickened our pace, following as far as we could, through the dark tunnels.

Finally, a little light appeared in front of us.

My heart shook, and I hurriedly dragged Zhang Ji beside me.

"Be careful, let's go slowly. There is a problem ahead. ”

He nodded at me when he heard me, and immediately took out his dagger from his body, placed it across his chest, and cautiously followed me.

I took a closer look at the space.

There were actually four round fist-sized beads around here, and these beads actually emitted a faint light in the current underground.

The dark green light lit up the entire space, as if entering the underworld.

"Glow-in-the-dark balls?"

Zhang Ji in a word.

This thing does look like a glow-in-the-dark orb, but it must have been a thousand years old beneath this deep underground.

If there was no light, it would be impossible for these luminous balls to glow as they do now.

Unless there is another light source here.

I moved cautiously here, the glow-in-the-dark ball was not strong, only faintly illuminating a few corners around him.

But the very center of this room has become a blind spot that the light can't shine on.

I held up my flashlight and pointed it at the center.

It was empty, and there was no sign of ghosts or human beings.

I breathed a sigh of relief and beckoned Zhang Ji beside me to follow me closely and don't fall behind.

At the same time, I raised my flashlight and aimed it at one of the glow-in-the-dark balls.

And at this moment, the light of the luminous ball suddenly brightened a little, and quickly illuminated all around us.

"Is this thing so good at absorbing light?"

If that's the case, then I can probably imagine why there is such a dim light underneath the ground.

Maybe before us, maybe a decade or a few decades ago, there were people here.

They shone the glow-in-the-dark balls with light, and the light slowly radiated outwards until it was preserved until now.

If that's the case.

I immediately reversed the direction of the flashlight and shone at the balls of light.

Soon, the balls of light glowed greener than even my flashlight, illuminating the whole room in a transparent green.

The light here is so intense that it helps us to see the whole space clearly.

At this moment, I faintly heard footsteps coming from above.

And under our feet, there is no longer the weird sound just now.

"Can you hear me? Wang Wangyang, Cui Hao. ”

I yelled at the stone wall against it.

Soon, I could clearly hear a response from above.

"Okay, we're right above your heads right now, aren't we? Here we came to a tomb-like place with four coffins. ”

I was stunned for a moment, and I hurriedly asked the two of them.

"Four coffins, aren't they four night pearls? What's going on there? ”

There was a bit of confusion in the voices of the two people.

"There is no night pearl, there is nothing to see here, only four coffins. We can only see clearly when our flashlights shine through. Do you have four night pearls there, that's amazing, isn't it? ”

I immediately interrupted Cui Hao's complaining and hurriedly responded.

"Don't be envious first, I think there is a problem here, where are the positions of your four coffins?"

Wang Wangyang's voice immediately sounded.

"It's in the four corners of the room below, what's wrong with that?"

The panic in my heart was even greater.

"The four night pearls below us are also distributed in the four corners of the house, do you know what that means?"

The voices of the two of them immediately became tense.

"The top and bottom correspond, just like before!"