A monster full of sinister aura with a blood-red poisonous horn growing out of his head, nine feet tall, and countless blood-colored runes appearing on his body, was standing in the sandstorm with a wild face, looking at the several figures who were constantly struggling in the sandstorm not far away.

Just a moment ago, Bai Feilong finally dived into an underground cave, in the cave, wandering around a strange and mysterious aura that seemed to be half of chaos, of course, it couldn't be real chaos, this breath was very magical, he just came into contact, the skin on the surface of his body became cold, and then, there was a layer of goosebumps, he just wanted to exit this cave, but faintly heard that there seemed to be a strange roar from the depths of the cave.

This roar was full of daring and resentment, suppressed as if it had been hundreds of thousands of years, and fixed his mind, Bai Feilong hesitated for a while, but still pressed his eyebrows with his hand, and looked at the depths of the cave with a blazing gaze, and then raised his left foot, and made up his mind to walk in.

This cave is very remote, and it is also very deep, Bai Feilong doesn't know how deep he has gone, he silently felt it, and found that his divine sense seems to have been suppressed, the further down he goes, the more cold and yin qi will become, he can't help but chuckle in his heart, and secretly said: Could it be that this leads to the Nine Shadows Yellow Spring?

After thinking about it carefully, Bai Feilong said secretly: How is it possible? But after all, he is a monk in the Jindan period, proficient in classical texts and various secrets, and he faintly feels that there must be something unusual about this extremely hidden underground cave.

Holding back the surprise and fear in his heart, Bai Feilong kept going down, the further he went, the darker it became, and the narrower the road became, about twenty miles away, Bai Feilong felt that this yin qi seemed to have reached the limit of what he could bear, and he had to stimulate his own mana to be able to resist it.

Walking here, Bai Feilong's bad feeling in his heart became stronger and stronger, and he had the heart to go home, but at this moment, suddenly, with a ding, he was stunned.

Such a deep underground, such a heavy yin qi, not to mention humans, even insects and ants are difficult to survive, and it is surprisingly cold here, and there is no sound of wind, how can it suddenly make a dinging sound?

Driven by strong curiosity, Bai Feilong immediately stopped, lay on the edge of the wall, motionless, and silently observed.

The dark underground, the darkness, and the suppressed roar that came before, Bai Feilong also thought that he had heard it wrong, such a deep underground, most of the time there were no mineral deposits, and even if there were, he didn't have the tools to mine, so he couldn't take it away.

But Bai Feilong's intuition told him that there must be something else in this place, so he was still waiting silently, and this wait was more than an hour, but Bai Feilong never heard any strange sounds again, as if the previous dinging sound was just an illusion of his.

"Impossible!" Bai Feilong gritted his teeth, ready to wait another hour, if he still didn't find anything, he would leave here first, and then come down when he was fully prepared.

Time passed silently from his fingertips, and Bai Feilong finally had to sigh faintly, lifting the hem of his clothes with his hand, just about to make some moves, at this moment...

"Wow, wow, wow, wow, hmm

A moment later, two charcoal fires approached rapidly from a distance, and in the boundless darkness, they seemed extremely bright.

Getting closer, Bai Feilong breathed a sigh of relief and found that where was this charcoal fire, it was clearly a monster's eyes, this kind of monster he had never seen before, shorter than a dwarf, but with human-like limbs, the eyes would shine, like red-hot coal, the most terrible and ugly thing was that after he opened his mouth, he revealed a mouth full of earthy yellow fangs, the monster had no neck, but the head could turn back freely and quickly, only to hear him again "Wow! He screamed a few times, then waved his hand behind him a few times, and then a dozen monsters ran from the depths of the earth carrying a huge metal basket.

Although the monster was short in stature, its movements were as fast as a sharp arrow, and in a few flashing breaths, it rushed in front of the hidden white flying dragon.

Bai Feilong looked at all this dumbfounded, and after a little thought in his head, he felt that this might be an opportunity for him, and he immediately followed.

The route taken by these monsters is very strange, flickering left and right, up and down, and I don't know if the messy passage in this underground world was opened by them, Bai Feilong held his breath and followed behind the monster, but fortunately he was a monk in the Jindan period, otherwise he would have almost lost it.

The monsters, led by the monster at the head, carried the metal basket and ran fast, inside the basket, there was a large pile of black things, which looked a bit like coal, but Bai Feilong knew that it was not coal, but a mineral that was cherished in the entire human world, which could be used to refine weapons on a large scale, as long as a little bit was added, any magic weapon would become very strong and indestructible.

Such a large pile of these minerals is enough to be equivalent to the entire wealth of a small sect.

I didn't expect this monster to be so rich, Bai Feilong followed behind the monster, and after turning around, he suddenly found that he came to a very large underground cave, as soon as he entered this cave, he was completely stunned, and hurriedly cast a stealth spell on himself, and then looked at it carefully.

I didn't expect that a huge square covering such a large area was dug out here, in the dim underground world, almost impossible to see at a glance, everywhere are the kind of monsters that I just encountered, some of these monsters are not clothed, they look very poor, and some are human, learn how to dress up as human beings, sew clothes with simple fabrics and wear them on their bodies, and use various minerals in the underground world to enter the trade, and the things they trade are also strange, but the most are the rhizomes and insects of some plants, it seems that these are the food that monsters like。

Bai Feilong felt more and more strange as he walked along, and at this moment, he found that the monsters carrying metal baskets in front of him suddenly stopped, and the place they went to was the center of this underground world, a small square with a small area.

The reason why these monsters stopped was because they had already delivered things to the people who needed them, and Bai Feilong saw the black figure in the square in the distance that was completely different from other monsters, but his pupils shrank suddenly, and he had an incredible feeling.

"How is it possible? Isn't this the human world? How can a mind-eating demon who is obviously only in the ghost world appear here?"

It turned out that the metal basket waiting for the square was a unique mind-devouring demon in the ghost world, the mind-devouring demon was a very evil ghost, and its strength was at least foundation-building, and the one in front of him, Bai Feilong did not dare to underestimate it, and it was three points stronger than him.

In a small underground space, there was actually a mind-devouring demon, which seemed to be a small matter, but Bai Feilong didn't dare to think so.

At least at this time, he immediately thought of a very bad possibility, could it be...

At this moment, the mind eater seemed to have made a deal with the monster here, and the monsters happily obtained the materials brought by the demon, and the demon also collected the whole load of black minerals into the storage ring on his finger.

A Mind Eater Demon is indeed nothing to the entire human world, but if it is not one, but hundreds, thousands, thousands?

Thinking of this, Bai Feilong's breath was a little stagnant, he touched his storage ring, and was about to take out a Wanli transmission note from it, but at this moment, his mind suddenly moved, and his outstretched hand hesitated again, if this matter was told to the sect, he would receive some praise at most, but if he could go deep into the tiger's den and fully understand the truth, although he might have to take a lot of risk, he would definitely get a lot more.