Nie Lin also looked up by the light, and sure enough, he saw that the stone wall was a little special, and what was even more peculiar was that there was a groove in the lower left corner of the stone wall, which seemed to be able to rotate.

"I still have a stone of that kind here, do you want to try it and see if you can open this door?" Gu Menghan was also a little curious, so he took out the last piece of that kind of oval stone.

As soon as he thought of it, Nie Lin found some big stones and put them on the ground, reached the stone wall with his hand, inlaid the stone into it, and then turned the trough with force.

Click~!

Sure enough, after the button on the stone wall was turned, there was a sound that seemed to be when the mechanism was activated, and this sound was very long, and the light of the stone in the trough was extremely dazzling.

Nie Lin could vaguely feel a magical power circulating from the stone wall, and at this time, the 'boom' sound in the surrounding passages continued to sound.

The passage was slowly trembling, and as the glare of the stone began to dim, some small ore began to fall down the surrounding area, and the stone wall was also moving slowly, but slowly.

Crash!

Just as the stone wall was moving, suddenly a line of water gushed out like a fountain, followed by two streams, three streams...... As more and more water jets spray down, it's like a waterfall.

As the cracks in the stone walls widened, the waterfalls poured down like floods that had been opened.

"Stay out of here!"

Nie Lin saw that the water was getting more and more violent, and finally changed color, so he pulled Gu Menghan and quickly ran towards the incision of the passage, and behind that, the spreading water was like a surging wave crashing on the shore, the water was very turbulent, and it was also roaring and rushing in their direction.

The impact of this water potential is very strong, fortunately, it will flow into other places, and when Nie Lin pulled Gu Menghan out of the passage, he was only soaked to the root of his feet.

It wasn't until they ran to the incision of the passage and jumped to the mouth of the other passage that they saw that the water was like a waterfall, pouring down from the incision into the crack in the mountain, like a waterfall wonder, which was very spectacular.

There was a blockade in the middle, but part of the strong water momentum still flowed into the other half of the channel, and it had already soaked into Nie Lin's calf.

"Look, what are those?"

Gu Menghan's eyes suddenly widened, pointing to something floating in the passage in front of him, but when his words fell, he saw that it was a large pile of human bones, and it also slowly slid down the waterfall into the mountain crevice of the incision.

It's just that the number of bones, at this time, is constantly gushing out of the channel along the water, and the number is so large that Nie Lin can't help but feel numb in his scalp, and he is shocked in his heart, how many people have to die to have so many bones.

The waterfall at the incision was still pouring down, Nie Lin and Gu Menghan waited for nearly an hour or so, and the water gradually subsided, and the water gathered in the mountain crevices below, all of which were about to become a river, especially the large number of skulls floating on the water surface, even terrifying.

"So much water, it should be rain or snow water accumulated in the mountains for many years, but how can there be so many human bones?"

"Let's go to the Bimen again, there should be an answer inside!"

As he spoke, Nie Lin entered the passage over there again and headed towards that place.

There were still many floating bones in the passage, after Nie Lin and Gu Menghan walked to the wall door, they saw that the wall door had been opened, he used a mining lamp to illuminate it, and saw that there was a staircase that led to nowhere, and on that staircase, there were still a large number of bones and all kinds of rusty long swords.

Thousand-year-old veins, a large number of dry bones piled up like mountains, what happened here.

There's something strange about it all.

Nie Lin went up the stairs first, and after pulling Gu Menghan up, he went up the stairs, only to feel that there was a cold chill and a thick and rotten aura in it.

From the staircase, about a dozen feet high, there are more bones there, and it is easy to think of this place as a pit tomb in a mine.

After the bones were washed away due to the erosion of the stagnant water, it was not until Nie Lin walked up to the top of the stairs that he saw a wall door that was also open, and after he walked out, it was obviously a mysterious passage again.

This passage is a single passage, some of it is dirty and cold, it is all rotten dry bones in the end, and after stepping on it, it will turn into a pile of bone mud, and it seems that all the people in this vein are crowded here.

But from the long swords that can be seen everywhere on the ground, it seems that they are not miners, but swordsmen, but they are no longer wearing silver silk soft armor like those in the passage below, and the things scattered around have deteriorated and decayed because of the cold environment here, and there is even a pungent breath.

"Judging by the direction below, this passage should be east-west, we are in the central section, which direction are you going to go?" Gu Menghan said.

"To the west!"

Nie Lin seemed to be affected by the incident entrusted by the old Orion's grandfather in his memory, and he was a little paranoid about this direction, so he blurted out without thinking about it.

So the two of them went to the west passage.

However, there were too many dry bones in this passage, and the further west they went, the dry bones almost blocked the passage, which made the two of them even more curious about what was going on here, and why there were so many swordsmen instead of miners mining red gold ore.

After the two of them had walked for about half a burnt of incense, suddenly a silver light flickered in the distance in the dark passage.

Faintly, with the silver light flickering, there was an extremely powerful sword intent surging, and a cold and fierce roar also came from this cold passage, making people's hearts tremble.

After feeling this sword intent, Nie Lin suddenly felt a little uncomfortable at this time, the originally calm sword qi in the sea of qi seemed to be about to move, and it was actually a little out of his control.

"There is a strong sword intent here, I feel that the sword breath in my body seems to be a little scattered, what is that silver glowing thing?" Gu Menghan's face was not very good, and she Nie Lin was the same, and under the curiosity in her heart, she was also a little vigilant to resist.

Nie Lin wanted to calm the scattered sword qi in his body, but the more he tried to calm it, the more intense the sword qi would be, especially the sword spirit with killing sword intent in the core of the dantian, which also seemed to be affecting his mind, and he was a little eager to kill.

How so?

Nie Lin thought about it, but he didn't dare to be the slightest bit lazy, he immediately concentrated on his mind, let himself concentrate, and after being ethereal in his mind, he tried to cater to the sword intent, and the sword qi in his body slowly calmed down.

Seeing that Gu Menghan was resisting, Nie Lin reminded: "Don't use your skills to resist that sword intent, let your mind relax, try to cater to that sword intent, don't resist."

Although Gu Menghan was puzzled, she did as she was told, and after a while, sure enough, her face was much more relaxed.

"What the hell is that thing?" Nie Lin was curious in his heart, but he didn't dare to think about anything, and involuntarily took a step and walked slowly towards the silver glowing place.

Gu Menghan was a little worried, and wanted to remind Nie Lin, but when he saw him walk over, he had no choice but to follow behind.

The two of them walked for a long time, and when they reached the end of the passage, they came to an empty hall.

The cave hall was very large, and the bones around it were piled up like a mountain, but the most striking thing was the skeleton that did not fall down standing in front of a stone platform in front of the pile of bones in the middle of the cave hall.

Beside this skeleton, there was a sword, and it was this sword that supported this skeleton to stand, and the silver light that Nie Lin saw in many distant passages came from this sword.

Naturally, that powerful sword intent also came from this sword.

This is a peerless sword!

......