At this moment, the three of them slowly advanced in the small hole that could only be crawled on their knees......

Thanks to Shi Yan's real mining work in the sect, although he is underground, his sense of orientation is excellent, and he has an accurate grasp of the flow of the Fire River, and he has avoided the Fire River many times.

Why avoid it?

Think about it, digging in such a small hole, if a river of fire is dug up and the magma flows in, won't it lead to fire and burn yourself, and all your efforts will be lost?

However, Mu Qing and Murong Xue were fine, and Shi Yan was miserable. Now, he is the only one urging the Fa to dig a hole, which consumes a lot.

Every half an hour of digging, Shi Yan gasped and stopped to rest for a while.

Mu Qing was not stingy, took out the elixir, and handed it over one by one......

So, the three of them didn't care whether the tunnels of the river of fire were filled or not, and they dug like this, and they kept digging for about ten days, and they didn't know how far they went, and finally, as a boulder in front of them was drilled through, a familiar breath poured in!

It's dirt!

Mu Qing was overjoyed, his divine sense probed, ahead, there were no longer those lava reefs, but sand and soil, although there were still large and small gravel, but it was already possible to urge the earth escape technique!

So, Mu Qing pulled Murong Xue with one hand and Shi Yan with the other, urging the Earth Escape Technique, like a swimming fish, jumping upward......

After going up for about a hundred feet, the three of them emerged from a space.

This is not the ground, you can't see your fingers, under the divine sense, it seems to be a narrow tunnel, the width is only enough for three people side by side, and the height is just over the head, but it is extremely deep, zigzag forward and backward......

Shi Yan urged the law to decide, and a ball of fire condensed in the palm of his hand, instantly illuminating the surroundings, this is indeed a tunnel!

Mu Qing said: "We came up diagonally, and we didn't know where we went, we continued to escape, went to the top, and then found the right direction to return to the ancient lantern." ”

Murong Xue nodded yes.

Shi Yan was suspicious and said, "This seems to be a spirit stone mine!"

"Spirit Stone Mine?" Mu Qing was suddenly a little curious. He remembered that Yunlan Sect also had a spirit stone mineral, but he hadn't been there, so he couldn't help but say, "Senior Brother Shiyan, how do you know that this is a spirit stone mine?"

Shi Yan stretched out his hand and stroked the gravel on the cave wall, pointed to some of them, and said, "You see, these stones are carbon crystals, and where there are carbon crystals, most of them are accompanied by spirit stones. ”

Mu Qing didn't know this kind of carbon crystal, and naturally he wouldn't record this kind of ordinary garbage in his book.

Shi Yan said again: "This spirit stone is not a spirit stone, it is a thing called spirit pulp, like viscous rice soup, this spirit magma was originally melted in the underground magma, and it is impossible to distinguish which is magma and which is spirit magma, but with the change of the earth's crust, some magma will rise upwards and gradually cool, in this process, the spirit magma inside will condense into a ball, just like the dew drops on the blades of grass, it will become the appearance of the spirit stone, and the other components will condense this carbon crystal ......"

It was the first time that Mu Qing and Murong Xue had heard someone talk about the formation process of this spirit stone, and they were immediately very curious, and listened to Shi Yan with all their attention.

Shi Yan continued: "But at this time, the condensed stone is not a spirit stone...... At this time, it is called the Rong Ling Stone, and it has a characteristic, that is, it can slowly absorb the surrounding spiritual energy, and store it, and then it is the vicissitudes of life for tens of thousands of years, and when the spiritual energy is fully absorbed, it becomes the spiritual stone we see......"

"I see!" Mu Qing and Murong Xue suddenly realized.

Mu Qing suddenly thought of a question and said, "Senior Brother Shi Yan, then why does this spirit stone have three levels, high, medium and low? How can the aura contained between them be so coincidental that it is remembered by ten times?"

Shi Yan smiled and said: "This is the wonder of the creation of heaven and earth, I can't say clearly, but what I know is that when this Rong Ling Stone was formed, some were large, some were medium, and some were small, but there were only these three sizes, the big ones were like walnuts, the small ones were like pigeon eggs, the middle ones were slightly larger than the small ones, and the big ones absorbed the most spiritual energy, which were high-level spirit stones, followed by middle-level and low-level spirit stones, and the spiritual energy contained in the spirit stones of the same grade was basically the same, and the difference would not exceed one or two percent." ”

Listening to Shi Yan's introduction, Mu Qing seemed to be listening to a scholar's lecture, and then asked: "Senior Brother Shi Yan, that's not right, if this Rong Ling Stone absorbs the spiritual energy halfway through and is dug out, then isn't the spiritual energy it contains fifty percent of other people's?"

Shi Yan smiled slightly and said, "Senior Brother Yang, you haven't mined the spirit stone mine, have you?"

Mu Qing and Murong Xue shook their heads at the same time.

Shi Yan said: "So you don't know, if this Rong Ling Stone is not full of spiritual energy, when it is mined, it will be like an ordinary stone, and it will not be able to absorb spiritual energy from it at all, so the spiritual stones that are in our hands are all the same finished products full of spiritual energy, and those semi-finished products, the monks will not pick them, and they will be kept for future generations." ”

As he spoke, he took out the greatsword and dug it up on the wall of the cave, and after a few strokes, a large pit appeared in the wall of the cave, and some gravel rolled down with the dirt.

Shi Yan rummaged through the rubble, picked out a piece and handed it to Mu Qing, saying, "This is it, can you feel the aura in it?"

Mu Qing put this stone the same size as a low-level spirit stone in his hand, and his divine sense probed, and sure enough, this was an ordinary pebble, just smoother than a pebble.

Throwing down this Rong Ling Stone, Mu Qing sighed: "The power of creation in this heaven and earth is really amazing!"

Shi Yan said: "Okay, this mine cave is obviously not naturally formed, let's walk along this mine cave, from the direction we came up, it is speculated that this place is not far from the sect, it should be regarded as the boundary of our ancient lamp, and I don't know which sect's monks are mining here!

Let's move forward.

I didn't expect Shi Yan to still have such a "sense of responsibility" and think about the sect everywhere. Mu Qing shook his head and followed, but said in his heart: If I have a spirit stone vein of my own, it will be comfortable!

Murong Xue said: "Senior Brother Shi Yan, if you meet a monk from another sect, and they steal the spirit stone mine and we find out, won't they fight? The other party won't kill people, right?" I think we'd better go back first......

Shi Yan said: "Senior sister, don't worry, which sect would send a monk from the Spirit Crystal Stage to do this mining business? Even if someone is here, it is just a low-level disciple." ”

Murong Xue nodded and said to herself, "That's not afraid." ”

......

The three of them walked and looked, but found that this mine was extended in all directions, and it was not inferior to the underground fire network. Moreover, there are some small mines that are only the thickness of a basin, such as a long pipe, and I don't know who can enter such a small mine to mine, is it possible to be a child?

Although these small holes are weird, since they are all gravel and soil, Mu Qing is not worried, and just as Shi Yan analyzed, no sect will let the elders of the Spirit Crystal Stage come to mine. Even if you don't escape, with your current cultivation, plus Lao Yu, Yun'er, and Xiaocan, as well as Murong Xue and Shi Yan, to deal with the monks in the Spiritual Period, you don't want to play, just play how you want? You don't have a temper!

The road was unusually quiet.

The three of them walked through more than a dozen forks in the road, and entered a spacious space, where the ground suddenly concave seven or eight zhang, forming a large pit, with a radius of 100 zhang wide, and countless thick and thin plant roots probed down from the top of their heads, as well as stalagmites hanging upside down, one of which was the thickest, crawling all over the roots.

On the ground directly below the thickest stalagmite, there were a large number of spars that shone with various colors, piled up like a small mountain, and they were all spirit stones, as many as several million.

Mu Qing's eyes lit up instantly, thinking about his "bottomless pit"-like spirit fish, Mu Qing's saliva was about to flow down, and he looked at no one around, and said in a low voice: "Senior Brother Shiyan, it doesn't matter which sect he mines here, how about we collect some interest first!"

Shi Yan pondered for a moment, but said: "It stands to reason that this is not in line with the rules of the Immortal Family, but, Senior Brother Yang, you are not a disciple of our ancient lamp, but I can't control what you do." ”

Mu Qing thought that Shi Yan would be polite, and then suggested that everyone divide these spirit stones, because Mu Qing knew that even if he was Elder Tan's personal disciple, the spirit stones he could receive from the sect every month were very limited, even if he hunted demon beasts on weekdays, collected spirit grass and minerals, and had some other income, it was incomparable with his own "local tyrant" who was destined for the world.

However, in the face of this windfall, he was all moved, and Shi Yan was not greedy at all, which was really admirable! I also remembered that in the fire ant cave, Shi Yan's words that "people die for money and birds die for food", and he admires this senior brother Shi Yan even more! No wonder Yan Wei is so respectful to this senior brother.

However, since Shi Yan said so, he acquiesced.

Mu Qing smiled, jumped down, the spiritual power rolled out, and put those spirit stones into the storage ring, among which there were tens of thousands of middle-level ones, he looked at Shi Yan and said: "Senior brother, then I will keep it for the two of you first, and then divide it when we go out, the rules of the fairy family, those who see it have a share!"

Shi Yan smiled silently.

Murong Xue looked at his bad appearance of being cheap and obedient, but she only had joy in her heart.

This trip to the underground fire river, although thrilling, is very rewarding, Mu Qing's mood is good now, and it couldn't be better!

He looked around and found that there were still seven or eight wide passages on the surrounding cave walls, and there were forty or fifty of those tiny holes, so he said: "Senior Brother Shiyan, I don't know how the heads of these monks grow, why don't the spirit stones be mined and put them away directly in the storage bag? Instead, they will be piled up in the hole! Let's keep looking, I guess there are others! If you don't do two things endlessly, don't blame my brother for having long hands!"

His current momentum is similar to Yukun.

This is called the red of those who are close to Zhu and the black of those who are close to ink!