There was always an inexplicable mysterious feeling in his heart, as if the tide sacrifice launched by the Demon Soul Secret Domain was extremely threatening to himself, as long as there was a chance to destroy it, he would spare no effort to make a move.

And entering the Demon Soul Secret Domain is not just to destroy the matter of this Demon Soul Tide Sacrifice. There was a Yin Fountain that spewed out Yin Qi aura, and there were things related to the passages from all walks of life, all of which were the primary purpose for him to enter it.

Since Yun Yu had made up his mind in his heart, he naturally had no intention of changing his mind. But when it comes to his own safety, he must be well prepared and still have to do it.

There was not the slightest aura energy in that Demon Soul Secret Domain, and for the Terran cultivators, it was naturally impossible to survive and cultivate in it or fight against the enemy.

But for Yun Yu, it is not a big problem, and it can also be said that there is no slightest impact, Yun Yu, who has the Ghost Spirit Transformation Miracle Technique, can naturally easily absorb the Yin attribute energy and refine it into the energy aura in the body, and it can also be converted into the required attribute energy.

Entering the temporary cave mansion opened in the small valley before, Yun Yu stayed for more than three months.

In the past three months, no monks have come to disturb them, and the battle near the Valley of Demon Souls has long since ended. Under the current attack of the Smoke Torture Soldier, the Terran monks of the Lost Land, after only losing more than ten people, slaughtered thousands of demon souls on the spot.

Although some of the hundreds of demon souls escaped into the Lost Land, they were all killed in the nearby land under the encirclement and suppression of the team led by Yan Xing's personal action.

One day more than three months later, Yun Yu was forbidden in front of the cave mansion in the small valley, and suddenly disappeared, and a figure flashed and appeared in the sky above the small valley.

With a flash of light, he flew towards the location of the Demon Soul Valley. After more than three months of retreat preparation, Yun Yu finally appeared.

This time, he did not meet Yan Xing, Lei Xiao or Mengtian of Nanmeng City again, but his figure flashed, and he directly entered the valley that was still covered by the smell of blood and mist, and headed towards the crack in the air.

As soon as his body was submerged in the blood mist, he sacrificed a faint gray-white talisman, and after activating the talisman, under the fluorescent flicker, his entire body turned into nothingness.

As the energy of the gray-white talisman was exerted, Yun Yu's figure disappeared directly on the spot, missing no trace, and even his breath was not visible at all.

This kind of talisman of concealing the body and soul aura is one of the preparations for Yun Yu's retreat and refining, and the power that can be exerted in his hand at this time can make the divine soul sense of the powerful monk unable to sense it, unless it is too close.

If there is a small distance, not to mention the more than ten Demon Venerable powerhouses in the Demon Soul Secret Domain, even if the powerful cultivators who have reached the Demon Spirit level Upper Realm meet them, there are not many possibilities that can expose them.

The concealed body method was submerged into the spatial crack, and although one of the outward suction forces still existed, the suction force that sucked a large number of demon souls from the Demon Soul Secret Domain to the Lost Land was still obvious.

But for Yun Yu, naturally it won't have much impact. Sensing the gray and white mist around him, Yun Yu was also vigilant.

The power of this kind of spatial power, until this time, still left an indelible tragic impression on Yun Yu, and even Yun Yu was very afraid of it.

In its soul power to probe the surrounding places, his eyes were flashing blue at the same time, and he exerted his secret technique of exploring the void spiritual light.

In the spatial cracks, there were bursts of sharp spatial power, and the fierce wind was like the blade of the wind knife, slashing and blowing in a disorderly manner, containing wisps of spatial power and the mysterious power that weakened the divine soul.

Although these Yin Wind Blade-like Yin Wind Winds had little effect on him, if he was a cultivator who was too weak in cultivation, he would inevitably be slashed and killed by this kind of Yin Wind with Yin attributes and a trace of spatial power.

The distance of this spatial crack was not very long, and only about half an hour later, Yun Yu only felt a light in front of him, and his figure appeared in an open place.

It appeared in the shape of a valley, and although it was also covered with mountains and rocks, there was no vegetation in it, and it seemed like a dead place.

But feeling a surge of thick and pure Yin attribute energy around him, Yun Yu was suddenly shaken, and his eyes flashed.

There was also a rare look of joy on his face, where he was, the Yin attribute aura energy that permeated his body actually contained a trace of Yin attribute spiritual power.

Even if he couldn't go to that Yin Spring Breath Existence on this trip, just by cultivating in this valley for decades, the Yuan Power of the Yin Attribute Breath he absorbed might be enough to make the Ghost Spirit Transformation Miracle Technique advance to a first-order realm.

Receiving the excitement in his heart, Yun Yu quickly released the soul power probe, shrouding the land within tens of thousands of miles around him.

What made Yun Yu's heart feel a little reassured was that within the tens of thousands of miles leading to the Lost Land, there were no high-level demon souls stationed there.

There was a gray-black mist all around, and there was also a smell of bloody mist from the valley of the Lost Lands, but it was not very noticeable.

It was only mixed in the gray and black mist, and instead of swarming into the spatial crack, it rolled outward towards the square land.

It may be that this source aura that contains the joy of the demon soul is attracted to it, so that the spatial crack here was discovered by the powerful monk in the demon soul as early as I don't know it.

Within the range of the soul power detection, a place shrouded in white mist in the southwest appeared in its brain domain.

In that dense white mist that soul power could not detect deeply, Yun Yu sensed the existence of forbidden aura fluctuations.

Although the fluctuation of sensing and this prohibition was not obvious, it still shocked his spirit, and after Yun Yu sensed this abnormality, he increased his soul power detection intention and concentrated his spiritual power on this place.

There is a place with a mysterious prohibition, you don't need to think about it, you can know that that there must be a place where a large number of low-level demon souls are gathered.

A large number of low-level demon souls, because almost all of them have no spiritual intelligence, even if there are high-level demon souls coercive and means constraints, it is not easy to coordinate and take care of so many demon souls.

If there was no fixed formation prohibition, this large wave of low-level demon souls would have scattered and fled in all directions, and there was a chase and killing everywhere.

In that land of dense white mist, the soul power was detected, and no demon soul was detected.

Every time the spatial crack is opened, tens of millions of Demon Soul Secret Domain have invaded the Lost Land, and a large number of monks from the Lost Land have never entered the Demon Soul Secret Domain in a big way.

Therefore, in the valley where there was a spatial rift, there were no high-level demon souls stationed nearby, and Yun Yu would certainly not be surprised in the slightest.

After thinking about it for a while, Yun Yu flew directly towards the place where there was a dense white mist.

If it was placed in the past, Yun Yu would have to think carefully and adopt a more roundabout strategy before making a move.

But by this time, his strength had already recovered to the realm of power, and his mentality had changed slightly, and at this time, his body was still in a state of concealment, and he was not afraid of being detected by the demon soul.

Under the invisibility of the Hidden Talisman, Yun Yu was sure in his heart that as long as he didn't encounter a too magical prohibition warning, even if he was a Demon Venerable Demon Soul powerhouse, as long as he didn't get close to his side, the other party would definitely not find out.

Stopping on top of a low mountain peak, his soul power swept over the vast area covered by white mist dozens of miles away, and Yun Yu's expression became condensed.

Within a huge valley in front of him, a huge valley with a radius of tens of thousands of miles was shrouded in a huge formation prohibition.

Such a huge formation prohibition was no less than the Sect Protector Formation prohibition seen in the cultivation world, and it was far greater than any formation seen in the Lost Lands.

Of course, the formation prohibition here, when it comes to the aura of the formation pattern spell contained in it, is not as magical as the ancient formation at the core of the Yuanji Mountain Range, nor does it have such a large formation range.

With the aura in his eyes that stimulated the Void Survey, although he was still dozens of miles away from that huge formation, he could still see a faintly large number of demon souls flashing in that formation.

Sensing the majestic energy fluctuations revealed by the white mist, Yun Yu thought to himself that it would be absolutely difficult to break such a large array with his formation attainments at this time.

Just by virtue of the arrangement of this formation and the cultivation of the formation, it can be inferred that the cultivation and strength of the Demon Venerable in this Demon Soul Secret Domain are definitely much higher than the level of the Lost Land.

Even if this formation was created by the Demon Soul Formation Master in the Ancient Period, the original formation in the Lost Land and the protective formation of the main city of the five major forces were all created by the ancient cultivators in the Ancient Period, but the level seen was far lower than the level of the formation seen in front of him.

Looking at the huge formation in front of him and the complexity of the formation spells, for a while, Yun Yu couldn't think of how to act, and he stood on the spot for a while, not moving.

According to the high-level demon souls and smoke punishments captured before, there should be three to four months left before the time of the Demon Soul Tide Sacrifice.

There have been a lot of surveys here, and there is no very good way to sneak into this giant array prohibition, for such a long time, of course, Yun Yu will not think hard about the way to infiltrate here.

As soon as his body moved, he flew away directly around the periphery of the huge formation, such a sophisticated huge formation, even if there were demon soul monks stationed in it, it was also within the scope of the formation, of course Yun Yu would not know that it was difficult to sneak in, and he would try to fight the grass and startle the snake.

A few hours later, Yun Yu had already sneaked around the periphery of the huge formation for nearly 10,000 miles. At such a distance, he didn't touch a single Demon Soul Cultivator, which also made him extremely speechless.

He was also extremely convinced in his heart that in such a short period of a few months, hundreds of millions of low-level demon souls would be transported to the Lost Land for the tide sacrifice.

And for such a large-scale operation, there was no presence of demon soul queues in the vicinity of this place, and there were no high-level demon souls seen.