A marsh pit is a methane pit.

There is no need to say more about biogas. Everyone knows what it is. In a nutshell, it is a combustible gas produced by microbial fermentation of various organic substances in isolation from the air, suitable temperature and pH.

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From these production conditions, we can see that this thing is very common in some tombs and underground ruins. In other words, there is more or less some methane in most tombs, but there are not many marsh pits.

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This thing is not very threatening to experts.

There is no open flame, so the probability of an explosion is very low. A veteran who goes to the grave has done enough work in advance. When encountering a methane pit, he can detect it in advance nine times out of ten, extinguish the open flame, and carry something to avoid poisonous gas with him.

The possibility of recruiting is extremely small.

Those who stumbled upon this were all stupid young people. When they entered the tomb, all they saw were gold, pearls, jades, and pieces of porcelain. There was no room for anything else. They rushed forward like wild bulls and struck out one by one.

A cigarette butt can blow up a whole group of people.

Based on all this, my first thought was - impossible!!

After working in our industry for a long time, people have to trust their own intuition. Some old people can even close their eyes and know where to go after going to the grave. If it is just a swamp, how can it make me feel hairy all over?

The moment I put my hands on the door, I really felt the wind whistling in my ears, as if the Lord of Hell was snickering at me. The feeling of death was so strong and real...

Zhang Xinya's expression was still sluggish. It seemed that Wan Niang'er had done a great job in lending her yin and yang eyes to me, so that now she was very sick. She struggled to support her body and walked forward, carefully

Observation, even using a lighter, scared Lao Bai almost to death, but fortunately there was no fire or explosion.

After struggling for a while, she still gave me a very definite conclusion. She said yes, there must be a swamp behind it. Some places were covered with frost and had nitrates. What else could it be if it wasn't a swamp?

She was sure, so I could only believe it and make inferences based on what she said, trying to figure out what kind of means could directly detonate the swamp behind me the moment I opened the door, and then blow me up into the sky.

"An open flame, at least an open flame is needed."

After thinking about it, my expression changed. I slapped a few people away, pried open the floor at my feet, and then cleaned up the mud. I lay on the ground and inspected it carefully. I was really shocked.

Cold sweat!

In the gap under this stone door, there is a small stone piece, a very inconspicuous little thing!

If you look carefully, you will find that the material of the stone flakes is completely different from the stone used here, showing a gray-black color, and the edge is a bit like the fracture of a shell...

flint!!

"Lack of great virtue!!"

After figuring out the clues here, Lao Bai cursed loudly: "What old bastard did this? He's not afraid that his descendants will have no wives. He knew there was a swamp behind him, but he was under the crack of the door."

Put a flint in it, and once the door is pushed, the stone door will press against the flint and rub against the ground. If a spark pops out, the brothers will all be blown up to the sky, and none of them will survive!!"

Indeed, the scene was terrifying just thinking about it. Although I didn’t really see the size of the pit behind the door, I could guess with my eyes closed that it would be no small. Even across the distance, the soil here was precipitated with saltpeter.

Once it is detonated, there is no hope of survival. The brothers will probably be broken into pieces in an instant and become minced meat scattered in every corner of this ruins...

Lao Bai was yelling and cursing there. Brother Yaozi and my master didn't look very good at first, but gradually they became weird.

As he cursed and cursed, Lao Bai vaguely felt that something was wrong. His yelling and cursing suddenly stopped, and he couldn't calm down and started coughing again and again.

I looked at this guy with a dark face and said through gritted teeth: "It won't harm our descendants. Just curse the person involved, and curse the descendants as well. Isn't that unethical? You should come over and take off my pants to see if I have any."

**son?"

Lao Bai said sarcastically: "Well... I didn't mean to scold you, but I didn't react at first, so the scolding went smoothly..."

I sighed, not in the mood to pursue it with him anymore, and scratched my head irritably.

In fact, the matter is already obvious.

If the mechanism on this door is very complicated and precise, for example, it uses mechanical structures such as tapstones and the Qianjun Arm, then the mechanism must have been built when this ruins were built. It can only be

The Three-Eyed Kingdom's own masterpiece is to prevent outsiders from easily entering here.

But this thing in front of me... can't even be called a mechanism. It's just a piece of flint stuffed in the crack of the door below. It looks more like it was done casually, but it is extremely hidden, extremely vulgar and vicious. If I hadn't been a little more cautious today,

, every one of us will die here.

This kind of behavior... To be honest, it's a bit unethical. It seems like I have nothing to do. I just stuff a small thing in my hand before leaving, leaving a big "surprise" for those who come after me. It's so cheap...

Moreover, there is another crucial point, which is the methane pit behind the door.

Will the Three Eyes Congress build such a methane pit next to their important land? Not to mention the smell, people will be blown up when they see an open flame. How dangerous. Unless they are mentally retarded, they will not do such a crazy thing.

design.

Therefore, biogas pits can only be formed naturally.

The problem is, when the Three Eyes Kingdom still exists, they will not allow methane pits to appear outside important areas. Even if they form accidentally, they will be cleaned up immediately. This pit can only appear after their demise.

Without the methane pit, there is no point in placing flint under the door. Therefore, when the man who did this came, the Three-Eyed Kingdom had already been destroyed and the methane pit already existed.

As far as I know, in the past thousands of years, only one person has actually entered this ghost city, and this person is - the heavenly official who put an end to the Black Mist Rebellion!!

When it comes to my ancestor, I can only rack my brains to clear him of such evil deeds. I pondered for a while and said: "Master, your guess is probably right. There is a big guy here who stuffed flints under the door.

, should be guarding against that thing, as long as the opponent attacks this door, it can be blown up instantly!"

Lao Bai probably thought that he had accidentally hurt me before, so he immediately changed his words and said: "It is indeed the method of the Heavenly Official. It is said that every outstanding Heavenly Official can make use of everything he sees with his eyes, and his methods are unpredictable.

The two characters, especially this one, designed such a terrifying killing situation smoothly. This is the true return to nature..."

As he talked, he couldn't even continue talking about himself.

Brother Yaozi was a little confused. He hesitated and asked: "Then should we find a place to dig into the fortress now, or should we pry open the door?"

I compared the directions and said helplessly: "To tell you the bad news, digging from our current position can reach the fortress in one go without turning. It's the shortest straight-line distance!"

Brother Yaozi fell silent, thoughtful.

I couldn't decide on this matter, so I could only look at my master.

"Open this door and take a look."

My master said lightly: "It's a very interesting thing. According to what you said, if there is another powerful thing here, he should be chasing the heavenly official at that time. He hid in this place and stuffed a

A flint is placed in the crack of the door to prevent that thing from pursuing it. Since we are here for the Earth Spirit Pearl this time, we have to go and take a look at the place where this Heavenly Official has been."

When I thought about it, it was the same truth. However, it was possible to chase the Heavenly Official until there was no way to reach the sky or the earth. Now that thousands of years have passed, if we meet, can we withstand it?

Zhang Xinya suddenly raised a question: "If the heavenly official really hid here in the end, where did he get out from?"

This question is difficult to answer. In my opinion, there is no other option except digging holes.

However, Robbery Cave is different from relics. It is very rough and difficult to preserve for a long time. If there is a slight geological change, it will collapse immediately. The so-called ancient round and square ancients are actually not that old.

Like those before the Northern Wei Dynasty, the robber holes left by tomb robbers can only be preserved under very special circumstances. Most of them have been annihilated. This is why many tombs have been robbed after being opened, but the robber holes cannot be found.

reason!

There is no point in tracing this back at this time. The robbery hole we dug is right behind us. Leaving is not a problem. The key is how to find the Earth Spirit Pearl!

Now that my master has spoken, there is nothing more to say and let’s get to work.

In view of the many evil deeds of my ancestors, I had to cheer up and checked carefully to make sure there were no other flints, so I asked Brother Kitale to take out the crowbar.

I have already checked the structure of this door. It is a door with a shaft. This kind of door is different from ordinary tomb doors. It is not push-open, push-pull, or hanging.

The flip-type door has an axis in the middle, and the door can rotate along this axis. The advantage of this kind of door is that the structure is stable and not easy to break. The disadvantage is that it can move up, down, left, and right, but the range of movement is not very large. The crowbar is inserted into the door.

There was a crack in the door, so if you pried it upwards, the door would be slightly raised, and then Brother Yaozi easily took out the flint underneath.

Rumble…
Chapter completed!