After separating from Chu Huaishan, Ji Tianxing and Yun Yao continued to walk deeper into the vein.

The light in the mine is dim, and there will be a stone lamp every tens of meters away on the stone walls on both sides.

The ground and cave walls are dark brown rock layers, with occasional layers of ore exposed in some sections.

Those ores are colorful and contain the aura of the five elements, which can only be formed after thousands of years of growth.

The craftsmen of the Qingtian Sect Refining Hall will smelt the mined ore to refine a purer Five Elements Aura and materials, which can be used to forge weapons and equipment.

In addition to this, some gemstones will also occur in certain areas where the purity of the veins is higher.

Those gems all contain a strong Five Elements Yuan Qi, which can be used by martial artists to cultivate, or used to set up formations and refine weapons.

All in all, the ore vein is a very important resource for the sect.

In order to mine the ore veins in the underground of Longshan, the Qingtian Sect once excavated hundreds of deep mine tunnels underground.

After the Heavenly Sword Sect took over Longshan, it even excavated on a large scale, increasing the number of ore tunnels to nearly two hundred, and going deeper into the ground.

The numerous mine tunnels are interconnected with each other, creating many intersections that are as complex as a maze.

Fortunately, Chu Huaishan had already given Yun Yao a map of the distribution of the mines, so that the two would not get lost in the endless forks.

Half an hour later, the two walked more than ten miles along the dark and winding mine road, and finally arrived at the place of the incident.

This is the end of the mine, a clearing with a radius of nearly 100 meters, like an empty and dark hall.

On the walls of the surrounding caves, layers of ore can be clearly seen.

Between each ore layer, there are seven or eight meters thick rock layers, and each ore layer is more than three meters thick and covered with colorful ore.

Yun Yao looked around and said in a deep voice: "At the time of the incident, that team of ten miscellaneous disciples was mining ore in this area. ”

Ji Tianxing looked around for a while, and sure enough, he saw that there were many scattered ores in the open space not far away, and a few pickaxes and bamboo baskets were also dropped.

Inside the bamboo baskets, there was also a small amount of ore, apparently newly mined.

There are also several traces of excavation in the ore layer on the rock wall.

Ji Tianxing frowned and thought for a moment, then asked tentatively: "Those ten miscellaneous disciples, although they didn't make it to the outer gate, they should all have the strength of the True Yuan Realm two or three. ”

"At the time of the incident, they should have been scattered in this area to mine, even if there was a sudden attack by a master, it would not be possible to capture them all in an instant, without leaving a trace. ”

"Senior sister, let's look carefully, we should be able to find clues nearby. ”

Regarding his analysis, Yun Yao nodded in agreement.

The two of them dispersed, investigating from both ends of the cave, their eyes keenly searching for traces.

After a while, Ji Tianxing discovered the clues and found many traces of the fight.

The rocky walls, as well as the pickaxes thrown into the ore piles, showed signs of sword slashing.

Yun Yao also made the same discovery, finding many traces of fighting.

After the two exchanged with each other, they vaguely analyzed some clues.

"Judging by the traces of the fight left in the cave, the fight was not violent, it was short, and it ended quickly. ”

"This can show that the strength of the murderer far exceeds that of the True Yuan Realm, and there is more than one, so he can quickly capture all ten miscellaneous disciples. ”

"Judging from the traces of the fight in the cave and the residual True Yuan aura, the murderer should be the strength of the Xuan Realm. ”

When he said this, Ji Tianxing already had a plan in his heart, and faintly guessed that this matter was most likely the Heavenly Sword Sect's doing.

However, after Yun Yao was silent for a moment, she suddenly made another discovery.

"Senior Brother Tianxing, I just found out that there is still the breath of the demon clan in this cave, and the masters of the demon clan have been here!"

"What?The breath of the demon clan?" Ji Tianxing was immediately stunned for a moment, frowning fiercely, his eyes full of doubt.

At the beginning, he assisted Yun Yao in carrying out the mission, and once teamed up to break through the magic cave.

He knew that Yun Yao had the bloodline of the Heavenly Spirit Holy Body and was very sensitive to the aura of all races.

Since Yun Yao had detected that there was a demon aura in the cave and was sure that the demon master had been here, he was of course convinced.

He was just puzzled, feeling that things were getting more and more complicated, and the truth was becoming confusing.

"Isn't it the Heavenly Sword Sect that did it? How could the Demon Clan come here? They shouldn't have the idea of fighting Dragon Mountain, so what do they want to do?"

Yun Yao also frowned, and her eyes were a little puzzled.

The two pondered for a moment, but did not figure out any useful clues.

So, Yun Yao proposed: "Judging from the traces left here, those ten miscellaneous disciples did not die here, they should have been abducted by the murderer." ”

"We continue to dig underground to see if we can find more leads. ”

Ji Tianxing nodded in agreement, followed her out of the cave, and continued to walk diagonally down along a mine path on the cave wall.

The passage is darker and narrower.

Ji Tianxing took a look at the distribution map of the mine and determined that this mine was newly excavated by the Heavenly Sword Sect in less than two years.

The two walked along the mine road for a while, and Yun Yao probed the breath left by the demon clan again, and he also found some subtle traces.

"It seems that this matter is very likely to be related to the demons. ”

"Those ten captured miscellaneous disciples should have been taken captive from here, and we continued to go deep into the ground. ”

Ji Tianxing and Yun Yao continued to advance deep underground along the mine road.

Along the way, the two continued to find some traces and clues, all of which were related to the demons and miscellaneous disciples.

About half an hour later, the two of them had gone thousands of meters underground.

This is where the newly excavated tunnel ends, and is stopped by a pitch-black cliff ahead.

Ji Tianxing and Yun Yao stood on the edge of the cliff, their eyes keenly observing their surroundings.

Behind the two of them is an empty cave, which is also the end of the mine, the site of the ore collection.

In front of them was a cliff, about 100 meters wide, and it was pitch black and bottomless.

Seeing this scene, both of them showed puzzled expressions and discussed in low voices.

"How can this be? There are cliffs deep underground?"

"This newly excavated mine path of the Heavenly Sword Sect has been blocked by a cliff here. If it weren't for us to investigate the clues, I'm afraid no one would have been here. ”

"Senior Brother Tianxing, there is still the breath of the demon clan here, and it doesn't look like a remnant, the breath is a little heavy. ”

"I suspect that there are demons lurking here, so we need to be careful. ”

Just when Yun Yao reminded Ji Tianxing to be careful, several black shadows suddenly rushed out of the empty cave behind the two.

A total of five black shadows rushed out of the darkness and rushed towards the two of them silently, emitting a rich blood light and killing intent all over their bodies.

At that moment, Yun Yao was instantly alert, and a cold light flashed in her palm, and a sword appeared.

"Senior Brother Tianxing, be careful!"

She turned to look at the black shadows, and slashed out five dazzling sword rays with a wave of her hand.