As his body quickly retreated into the depths of the Yin Absolute Mountain Range, Yun Yu felt that the strange aura in his body that devoured his soul power increased slightly, but it did not really reach the point of making him feel frightened.

The amount of his soul power is not at all compared to that of Chang Xiu, and he has thirty-six Heavenly Soul Lakes in his brain domain, among which there is a large amount of soul liquid accumulation, and naturally his soul power is a hundred times stronger than that of other cultivators of the same realm.

Although the devouring of his own soul power did not show much threat, Yun Yu also planned to pause for a while while only where he was, just waiting for the three old men to leave this place, he wanted to get out of this strange place as soon as possible.

The more he swooped in, the more he sensed and the strange power attached to his body became more and more obvious, and Yun Yu's figure suddenly stopped standing.

As soon as his mind moved, a large amount of internal fire energy mist erupted from around his body, enveloping his entire body in the dense mist.

His soul power detection was all focused on everything in his body that could be seen, including every inch of skin, and after a while, his soul sense locked on the strange power and detected where its source penetrated itself.

It turned out that there was a thin silk thread-like substance that was a hundred times thinner than a hair, and it was piercing into his body on his back, and the surface of his body felt that this thin silk thread was connected to an extremely inconspicuous energy line, and it was invisible and transparent, hidden in the surrounding black and gray mist.

Yun Yu's mind moved, condensing the power of the fire energy into light energy, and shrouded towards the silk-like substance locked by his consciousness, intending to destroy it or expel it from his body.

But what made him speechless was that the wisp of transparent silk thread that was difficult to see with the naked eye actually passed through the majestic fire energy that was stimulated in his body, and it had no effect on it, as if this silk thread did not exist, and he was not afraid of the fire energy that had been upgraded to a different fire.

Although at this time, Yun Yu's sense and the wisp of substance were still difficult to cause the slightest damage to his flesh or essence blood, but at this time, Yun Yu was already convinced that if he didn't expel this substance.

Therefore, the strange energy in the pitch-black Yin Absolute Mountain Range will use this small transparent silk thread that is difficult to see with the naked eye as the source, and continuously absorb soul energy from his body.

Although Yun Yu didn't know how the soul energy in his body could attract this strange energy of the Yin Absolute Mountain Range, he didn't know how long the majestic soul power in his body could make him stop here?

But what he knows is that if there is nothing to be done about it, and he can't absorb the source, the thin silk thread is pulled out, and what awaits him will be the devouring of his soul power, then it will happen next, as the old man of the Boundary Breaking Realm said, devouring his essence and blood is self-evident.

The expression was extremely solemn, Yun Yu's eyebrows were slightly twisted, and the majestic spiritual power in his body ran to his back, and a layer of Yin attribute energy was wrapped outside as protection.

Concentrated spiritual power condensed into two palms, and pushed them out from his body, and when he turned around quickly, and with a wave of his hand, an extremely thin transparent silk thread appeared in his palm.

This transparent and colorless silk thread, as if it had a spiritual intelligence, swayed in Yun Yu's palm, but it couldn't escape the superposition of the two energies on the palm.

Its body is so slender that it is difficult to see with the naked eye, but it is only under the aura of the cloud feather that it can be vaguely seen, and the soul power has scanned it, but it can only feel a trace of cold and cold breath.

"Well, this ...... Could it be the Silk of the Soul recorded in the classics!"

The blue light in his eyes flashed, and he looked at the extremely slender transparent silk thread in his hand, which was difficult to see with the naked eye, Yun Yu's expression suddenly changed greatly, and under the look, he couldn't help but whisper in his mouth.

The silk of the soul, of course, he is not too unfamiliar, although he has never seen this kind of magical thing, but his deity Yunyu has seen a ghost cultivator in the cultivation world Huanyin Mountain Range to cultivate this kind of strange thing, of course, the soul silk he condenses is not as high as the strange thing he sees in front of him, and there is no way to compare it at all.

Although the Silk of Powerful Souls is extraordinary, it can only restrain ghosts and the like, and like to devour yin attribute breath energy.

And of course, Yun Yu found out that the ghost cultivator practiced this method, and through Tao Ruojiao's forbidden technique of exploring the true spirit, he controlled the true spirit of the ghost cultivator, and made him recognize himself as the master, and of course he also knew the secret technique and method of cultivating the soul silk.

With the growth of Yun Yu's realm and his promotion to the rank of powerful cultivator, he was already among the top in the cultivation world, and this kind of secret technique of cultivating soul silk was no longer of much help to him, so Yun Yu did not spend any more time refining this strange thing.

As Yun Yu and the deity had experienced several times when they were separated from each other, they were naturally very familiar with this experience, but they also did not sacrifice such a strange thing. Although both Yunyu have cultivated the Ghost Spirit Transformation Technique.

There is also a point on the body, which is specially used to store the spiritual energy of the Yin attribute element, which can play a wonderful role in the forbidden soul and its escape space.

This is so useful for enemies or in the heat of battle. However, when used as its own protective force, its body is filled with a strange power, making its whole body tenacious several times, stronger than the cultivation of the same level, even if it is a demon cultivation or a demon cultivation.

And if such a strange thing is sacrificed, it can also be mastered quickly, and it can be promoted to advance at a faster speed, but this strange thing needs to devour the Yin attribute aura for a long time, and likes to devour the Yin Soul, so Yun Yu does not like it, and he has never thought about refining.

At this time, he saw another kind of soul silk appear in front of him, although it was similar to the record in the classics, but this kind of high-level soul silk that seemed to have spiritual intelligence and was difficult to sense by transparent soul consciousness was something he had never seen or heard of before.

The reason why he was able to recognize it at a glance was that in addition to seeing and hearing the deity's personal experience, it was also because he had refined the spiritual light of the void.

The Exploration of the Void Spiritual Light is also a secret method passed down by the Venerable Master Li Xuan, an ancient monk who broke through the realm and ascended to the Upper Realm Ghost Realm tens of thousands of years ago in the Huanyin Mountain Range, and the record of such a strange thing as the Silk of the Soul is also recorded in detail in the classics left by the Venerable Master Li Xuan's Cave Mansion, and it lists a variety of soul threads.

For the silk of the powerful soul found at this time, it does not cause damage to the monk's divine consciousness and soul, but only has a damage effect on the monk's essence blood and his own soul power, which is also the first time Yun Yu has seen this thing, and he has never seen or heard of it.

Even since he had verified that the Yin Absolute Mountain Range here possessed such a strange thing, Yun Yu finally understood why this place was listed as the first forbidden place by the cultivators in the Demon Soul Secret Domain.

Therefore, the special effect of strange things, if the cultivation of the Demon Soul Secret Domain enters, its body is a body with condensed yin qi, and it will naturally appear like being devoured flesh and blood, but I am afraid that even the body will be devoured by it.

After all, the monks of the Demon Soul Secret Domain are all Yin Souls gushing out of the Yin Spring, and after absorbing and condensing for many years, they have grown into Demon Soul Monks, and the essence of their bodies is still condensed by Yin Qi energy.

In the face of such a special strange thing with such an effect, Yun Yu was also greatly surprised, this powerful soul silk realm was very high-level, and he could ignore the energy of Yun Yu's body with the effect of destroying souls.

And its extremely slender and transparent color, able to hide its own body shape and its instinctive aura to the slightest, this strange thing, but never seen before.

From the time it appeared to the time it was attached to Yun Yu's body, Yun Yu did not feel the slightest breath of it, whether it was sensing or detecting soul power.

Such a strange thing, if it is possible to study the thing that is controlled by the sacrifice, for Yun Yu, it will be an extremely powerful secret technique.

Even the three peak Demon Soul Old Men who had reached the Realm of Breaking Boundaries did not dare to enter this Yin Absolute Mountain Range, because they were too afraid of this strange thing.

If it can be sacrificed, even if it is pursued by the three old men again, it can be sacrificed without him noticing, and hit the other party, causing the other party to be slowly swallowed by the powerful soul silk and the essence of yin qi in his body unconsciously.

It's just that only a wisp of this thing has been found so far, and if the expected effect is expected, this strange thing has a slow process of secretly devouring the three old men, and it can't have too much effect in an instant fight.

Although this strange thing can also give Yun Yu such an effect, but at this time, after Yun Yu caught this wisp of powerful soul silk, he couldn't help but be interested in it.

Imprison this wisp of powerful soul silk spell, receive it in the jade box, and put it away. Its form paused slightly, then sprang forward at a rapid rate again.

He had already made up his mind to collect as many Soul Silk as possible in this Yin Peerless Mountain Range, and set out to solve the Sacrifice Method, making it an extremely hidden and miraculous means.

As his figure slowly flew into the depths of the center of the pitch-black area, the gray-black mist that enveloped the sky over the entire area gradually thinned.

When I reached the depths and saw the whole dark blue mountain peak in the distance, the gray and black mist was completely gone.

In the center of this Yin Absolute Mountain Range, there was such an empty place without gray and black mist to cover it, which Yun Yu could not have expected.

With such a strange scene, Yun Yu was vigilant in his heart, and under his thoughts, the double shield mist formed by spiritual power and fire was also spread on his body, and as long as he encountered an unknown attack, he would immediately form a shield to defend himself.

The reason why I didn't sacrifice the soul power shield was that the soul silk I had discovered before could slowly devour its energy, but I guessed that once this energy was revealed, I didn't know how many attacks I would encounter next.

Although Yun Yu had the intention to capture more Soul Silk, this place was extremely weird, and he should not be careless until the level of danger was discovered.

In case there is a large number of powerful soul silks here, no matter how strong Yun Yu's cultivation strength is, I am afraid that it will be impossible to prevent it, and it will be attacked and devoured by the light soul power or soul in an instant.

After standing there for nearly half an hour, Yun Yu's soul power detection and void exploration aura scanned the location of the dark blue mountain peak in front of him several times, and then his face showed his complexion.

With a look in his hand, a miniature turtle shell object appeared in his hand, flashing with a dark light, and the spiritual power in his body poured into it crazily.