With the monster unstoppable, we were able to get in and out of the river the next few times, successfully marking every part of the cavern below.

In the end, we determined that several of these dozen or so caves were dead caves, as if they had been carved into extremely hard ore, and we could not continue to move forward, so we stopped carving.

Some of the other openings are filled with stone gates, and there are a total of eight stone gates.

Of these stone doors, seven of them are round, and only the one I first found is square.

The square stone gate is so large that it is larger than the fan-shaped stone gates around it.

Besides.

We also took pictures of the exterior of these stone doors, and the carvings on the outside of the other round stone doors are roughly the same.

It was all coiled dragons rising from below, surrounded by layers of clouds carved on top of each other.

It means that the dragon ascends to heaven.

And the rectangular stone door, on the edge of which a giant dragon coiled.

It's just that on the dragon's body, there seem to be seven stone carvings missing, and there are clearly seven holes in various parts of his dragon's body.

It's as if something needs to be inserted to open the stone door.

After I expressed my speculation, Cui Hao also agreed with my idea.

"As I swam below, I felt as if the square stone door was indeed going to put something on the dragon's body. It stands to reason that it should be the key to open the stone door. ”

Cui Hao looked at the other seven round stone doors.

"Do you have a feeling that the seven keys on this square stone door are probably behind these seven round stone doors?"

Originally, I didn't expect that.

After Cui Hao's reminder, I also suddenly reacted.

It's very likely.

It is likely that the keys to these mechanisms are all inside the remaining doors.

We need to go through them one by one and take out all these keys.

I immediately glanced at Cui Hao.

"Let's go, then we'll go check these holes."

After a few swims just now, we've got a rough idea of what's going on below.

No second monster rushed out.

Presumably, even if we go down, there shouldn't be much danger.

Cui Hao nodded at me and immediately said that he wanted to take the first stick.

For the sake of prudence, we decided to stay on shore and swim the other instead of all together.

After all, the risk is too high to go together, and if something really happens, we both have to plant here.

After Cui Hao went into the water, I waited on the shore.

After four or five minutes, he swam up from below with a disgraced face, and helplessly spread his hands at me.

"No, I didn't find anything. The stone door was closed, and there was no entrance at all, and there was no mechanism to open the entrance. I didn't know how to get in. ”

I took a breath.

Since such a cave has been set up here, there is absolutely no reason why you can't get in.

It must have been the switch still hidden in a hidden corner, and the two of us didn't find it.

I nodded, tied the rope, and jumped straight down.

Cui Hao grabbed the rope around my waist and waited for me silently on the shore.

Once again, in front of the round stone arch.

I reached out and began to grope around the wall.

The dragon flies into the sky, and the state is extremely comfortable and leisurely.

I looked at the flying coiling dragon and the dense scales on his body.

I had a guess.

"If the dragons on this side are not meant to let us in, or if this is not a stone gate, but a fake stone door, then maybe there is no dark room here at all. I'm going in the wrong direction. ”

I crept to the edge of the crack in the door, stretched out my dagger and probed inside.

The moment I plunged the dagger into it, it sank down less than half an inch before stopping.

"There's a problem, there's no crack in the door."

I carefully looked through the crack in the door, only to find that the crack in the door was narrow and short, and it didn't look like a normal stone door at all.

I thought about it.

I immediately swam out from underneath and quickly swam to the side of the square stone door.

I stabbed the edge of the square stone door with a dagger.

This time the dagger managed to sink more than four or five inches.

I was shocked and almost had an answer.

Those so-called arched stone doors are fake stone doors at all, and they can't be entered at all, and there is no secret passage behind them.

They may have placed them on the walls for the sole purpose of decoration.

On the other side, this square stone gate is real.

There is a passage in the back.

So those round arched stone doors, I just had to look closely at the edges to see if there was any mechanism in there.

Maybe the key is hidden in this carved wall.

Immediately turned around and quickly swam to the side of the arched stone door, ready to move.

It didn't take long for me to find out.

There was a problem next to the arched stone door.

There is a scale on the dragon's body that can be moved.

I tried to shake it from side to side, trying to get the scales out.

After some more tossing, I actually took out the fragment of the stone.

And the top of the stone is carved with a dragon scale.

This dragon scale can clearly correspond to the holes on the square stone door, and there is a high probability that it can be directly buckled inside.

"It turned out to be this."

Oxygen was running out, and I quickly swam out of the water with the scales.

When I came to the shore, I gasped for breath and told Cui Hao the news I found below.

Cui Hao looked at the stone in my hand, and his eyes lit up.

"In other words, the other stone doors are decorations, and the keys we are looking for are all within the dragon scales carved on these stone doors."

The fat man volunteered to jump down with his backpack on his back.

"I'll go, I'll take out the other six, and then we'll go inside the square stone gate to find out."

I nodded, and didn't stop it.

After all, judging from the current situation, there shouldn't be too much danger below.

Even if the fat man goes to fetch a few other stones, there is a high probability that there will be no accidents.

The fat man entered the water and swam out after nearly five minutes.

At this time, in his hands, he grabbed a few stones, all of which were dragon scales on the surface of those stone carvings.

Cui Hao put all these things into my hand, and then spit out a mouthful of water.

"Phew, we've finally taken all these things out, so what are we going to do next? Or continue one to launch one on the shore and one in the water? ”

I shook my head.

I had already thought about this when I was on shore just now.

Previously, because I didn't know what was going on underwater, I decided to be one on shore and one underwater.

But that has changed.

We've all found these scales, and we're about to open the stone gate.

The space behind the stone gate is unknown, so if there is danger inside, the two of us can have a companion.

Thinking of this, I bluntly asked Cui Hao if he would like to go down with me.

He nodded excitedly.

"Of course, in fact, I was worried that if I opened the stone door and there was something inside, it would be really difficult for one person to deal with. It just so happened that you said that the two of us can go together, so let's go down together to see how it goes. ”

I grabbed another section of the rope at the end, found another rope and tied it tightly, and tied it around my waist.

The two of us were tied together like conjoined babies.

In this way, if something happens to one person, the other person can come to help in time.

We took the seven dragon scale stone sculptures and quickly swam to the square stone gate cave.

Cui Hao and I picked up the dragon scales carved in stone and began to put them together on the wall.

Since these dragon scales are not the same size and shape, they do not fit into every hole.

The two of us put together a long time before we put all six pieces together.

Only the last piece remains.

I looked at Cui Hao, who nodded at me and stood silently aside.

I pushed his shoulder and pressed Cui Hao into the corner.

In case there is a mechanism inside, so we can hide in time.

I stood at the very edge and pressed the last stone into it.

The next second.

The stone gate made a rumbling sound.

Immediately after, the square stone door in front of us jerked upward.

A huge two-square-meter hole was quickly revealed.

There was a suction force from inside the hole, and there was no water in it, but suddenly the stone door opened, and all the water around it was frantically pushing Cui Hao and me and washing the two of us into the hole.

Before the two of us could react, the man slid straight in.

"Cui Hao, be careful."

While the water is not strong, it seems that there is still oxygen around.

I immediately shouted at Cui Hao.

I don't know if he heard it, Cui Hao didn't respond for a long time.

I gripped hard at the protruding stone on the wall next to me, barely settling myself.

The fierce water was constantly washing, and I could barely stand on my feet.

I tried to cling to the wall and climb out, but the fierce rushing water did not give me this opportunity at all, and the river washed me down again and again.

If I hadn't held on tightly, I would have been swept down by the river.

Cui Hao is relatively large, and he may not have grabbed the wall like me just now, but he should have rushed down the rushing river at this time.

The water is gushing.

And the space down there is so big that I had no idea how big it was, and it could hold so much water.

Just when I thought I was going to die here.

Suddenly, I noticed that the stone door in front of me began to press down.

And the originally turbulent river was suddenly blocked a lot.

The stone gate slammed through the river and slammed it down.

The original fierce splash stopped completely in an instant, and there was no longer a single wisp of water that could pour in through the crack in the door.

I touched around.

Now the splash under my feet had grown half an arm's length upwards and almost to my knees.