Gongsun asked someone to dig out all the iron coffins and carry them to the yard. These iron coffins weighed thousands of pounds, which was a blessing for the strange people in the Demon Palace. In addition to Zhao Pu's soldiers and horses, everyone worked hard to lift all the iron coffins up.

After they are lined up, they still look quite shocking.

Zhan Zhao, Bai Yutang and others gathered in the yard.

Zhao Pu took Xinting Hou and knocked on the iron coffin gently, and heard a strange sound.

Zhao Pu was slightly stunned.

Bai Yutang stretched out his hand and gently stroked the surface of the iron coffin. A thin layer of soil peeled off. Under the sunlight, the iron coffin was shining with dazzling silver light.

In addition to these thirteen iron coffins, there is also an ordinary coffin, which was used by Grandma Jiutou to bury the young man.

Gongsun opened the coffin because it was buried thirty years ago, and the body had long been turned into a skeleton.

Gongsun took out the skull, and everyone heard a "ding" sound. A nail fell from the skull and landed on the ground. He bounced twice and rolled to Zhan Zhao's feet.

Zhan Zhao bent down, picked up the very small silver nail, and handed it to Gongsun.

Gongsun took the nail and showed everyone the skull. He saw a small hole on the left side of his forehead. The nail was inserted into the hole, just right.

Everyone couldn't help frowning.

Bai Yutang asked, "So... is this person really someone with a black tattoo behind his ear?"

Gongsun nodded.

"But... he is not extremely vicious." Grandma Jiutou was puzzled, "but she cried very sadly."

"You mentioned that there was blood on the ground at that time." Gongsun said, "The scholar might have been injured or encountered something like the madman I picked up, which caused some deviation from the nail in his head... So, he might remember what he did when his temperament changed drastically, or the nail directly poked a place that shouldn't have poked, causing his temperament to change drastically, from extremely cruel to heartbreaking, and finally committing suicide."

Everyone touched their chins - it was possible.

"Actually, what I'm more concerned about is not why that person committed suicide." Gongsun seemed a little excited, "I found something."

While talking, two old men ran in outside.

Everyone in the Demon Palace naturally knew each other. These two old men were old nerds and were well-educated.

The two of them held several old books and picture albums in their hands, put them on the stone table, and asked Gongsun, "Is this the thing?"

Gongsun took it over and took a look. He first held the book and patted the ashes. Layers of dust were flying all over the sky, and everyone covered their mouths and noses, and there was a smell of mold.

"What era is this?" Pang Yu looked at it with his chin, "Is this burned or what? It's dark."

"This is an ancient geography," the two old men explained, "What was dug out of the library was Xiao Cang dug out of the ancient tomb."

Gongsun maintained a high mood and took out a roll of maps, spread them out, and placed them on the stone table for everyone to see.

Everyone came over to see.

Bai Yutang looked at the annotation next to him and was surprised, "Is this a geographical map from...a thousand years ago?"

"It's a mountain and river vein diagram. I remember I've seen similar ones before." Gongsun pointed to the place where the Demon Mountain should have been, and found two crooked lines, saying, "This is the location of the valley where we found the iron coffin. Look, what was this place a thousand years ago?"

Everyone clearly saw that the two twisted lines outlined a long river...

"Oh!" Grandma Jiutou also said, "There was indeed a branch of a river flowing through this place for a long time ago. Later, I don't know if it was because of the change of the river channel or the earthquake, but in short, it changed its route and turned into a valley."

Zhan Zhao looked at the topographic map and was a little strange, "Why are there villages or cities along the river banks, but only in this section near the Demon Mountain, there are only rivers?"

Gongsun clapped his hands, as if Zhan Zhao had the point, "It's here!"

Bao Yan was holding a stack of books on the side. This was what Gongsun asked him to read early this morning. Bao Yan reads books very quickly. After a while, he read a lot of books and found what Gongsun needed.

Bao Yan took the book and ran over and said, "It has been recorded in history that there are many shipwrecks in the rivers in this area! Almost any ship will capsize and disappear when passing by here, so people nearby say that this place is the waterway of the dead. It is said that people who are sailing at night have seen the dead souls swimming around in the water."

Everyone was slightly stunned.

Zhao Pu touched his chin, "The souls of the dead are in the water... Could it be the blue mist we see?"

Everyone thought it was possible.

Gongsun poked Zhao Pu, "Didn't you say before that there will be three triangles in dangerous places, all of which are strange dangers that people cannot change... If this waterway is like the ghost sea that never returns, will anyone mark the danger at the entrance of the waterway?"

Zhao Pu frowned slightly, thought for a while, and said, "That stone tablet may be a signboard! That ruin should not be just a ruin, but... a tall tower built in the water, with the stone tablet above the tower... In the most eye-catching place, passers-by reminders should not approach this area of ​​water, so there will be inscriptions and signs!"

Everyone frowned and nodded, "So that's it."

"The tower must be built in the water." Bai Yutang thought for a while, "The waterway gap in this place is quite large, the water flow should be very turbulent. A solid tower may be destroyed by the water flow, and the best way is to fix it..."

Speaking of this, everyone went to see the iron coffins with iron chains.

Wusha couldn't help but say "Oh", "It's not a coffin, but a load-bearing pendant! No wonder it's so heavy and so strong."

"What material is it made of?" Ouyang Shaozheng squatted down, looked carefully at the surface of the brand new coffin, and gently tapped it, listening to the sound, "I have never seen such a thing before."

"Maybe it's an antique." Yin Hou said.

"Since it was in the waterway that was a thousand years ago, did it sink under the riverbed later?" asked Mr. Bao.

"In fact, just dig the ruins and prove whether Gongsun's speculation is correct." Zhan Zhao said, "There should be a base of the tower at the bottom of the ruins. In addition, if the canyon was a riverbed before, there should be many wrecks underground."

After hearing Zhan Zhao's words, everyone looked at each other.

Hou Yin thought for a while and said, "Dig it open and take a look!"

At the order of the Yin Hou, the people in the Demon Palace brought the troops of Kaifeng Prefecture and Zhao Pu into the mountain together, and everyone began to dig the mountain.

First, I dug up the bottom of the ruins, and I saw the tower body and the base buried in the mud, and dug all the way down. Not long after, someone really dug a wreck.

"It's indeed a river." Tianzun touched his chin.

Everyone started digging until the afternoon, and found countless wrecks, as well as a large amount of gold, silver and treasures, which had been a long time ago.

Gongsun and his team found some remaining bottles and jars and analyzed them, which can be traced back thousands of years ago.

Everyone was studying, and they felt a sensation underground.

Bai Yutang gently pulled Zhan Zhao.

Zhan Zhao took two steps back, and a hole appeared where he was originally standing, and Han Zhang came out.

The earth covered in the gopher jumped out and swung it, pointing to the bottom, saying, "There is a stone brick roof below, which seems to be a big stone chamber."

Everyone was surprised.

Mr. Yin asked, “How many below?”

Han Zhang thought for a while and said, "I dug for half an hour! This is at least a few thousand feet underground!"

Everyone looked at Han Erye in surprise, "So deep?"

Han Zhang nodded, "Do you want to go and have a look? I'll take some tools and maybe I can dig through the stone roof. There must be something good underneath!"

Everyone nodded.

Zhu Ying led a group of shadow guards to dig pits and steps with Han Zhang all night.

...

Early the next morning, everyone came to the mountains again and saw Han Zhang and the Shadow Guards who had become several clay men standing at a huge cave entrance, rushing the mud on their bodies with water.

"How is it?" Zhao Pu was curious.

"Digged." Han Zhang said, "The stone chamber below has also been dug up. It's breathing. Let's go in until the afternoon! The smell there is not right, it has been sealed for at least a thousand years!"

Everyone was shocked. Did they dug up the tomb of ancient emperors or what? Why is it so magical?

In the afternoon, Gongsun prepared a masked veil for everyone to drink medicine to prevent poisoning. Several people followed Han Zhang with torches and walked into a staircase that was diagonally connected to the underground.

Han Zhang and the Shadow Guards dug the tunnel quite spaciously, but after walking on, they realized how deep it was. In addition, after getting away from the ground, it was pitch black all around, which made it feel like they were walking underground.

Finally, everyone arrived outside the stone wall.

There is a square hole in the stone wall, dug by Han Zhang and the others, but it is obviously quite deep below.

Zhu Ying took a contact arrow and threw it down.

In an instant, a "sharp" sound was heard, and the entire stone chamber lit up.

Under the fluorescent green light of the contact arrow, the situation inside the stone chamber was clearly revealed in front of everyone.

I could see that the bottom was about a few feet high, the ground was very flat, the square brick floor and the dust didn't look very thick.

Zhan Zhao was about to jump down and was caught by Yin Hou.

Bai Yutang also wants to go down, but is grabbed by the Heavenly Lord.

Lu Tianhan signaled everyone not to argue. He raised his hand and waved it to the ground, and a ray of ice of ice spread across... A layer of frost and white ice accumulated on the ground.

Lu Tianhan jumped gently and went down.

Others followed one after another.

There was no danger below as imagined. The ground was flat, there were no traps or other strange things, but the light of the contact arrow had disappeared.

The torch light could not shine too far, and the interior of the stone chamber seemed to be very large.

Tianzun couldn't help but touch his chin, "Oh, isn't the entire underground of this Demon Mountain empty?

"What should I do if I can't see the margin?"

Mr. Yin thought for a while and said to Zhan Zhao, "Call your ninth aunt here."
To be continued...