After breaking through the cultivation, Luo Song began to explore this beautiful space.

He had doubts before, but after deliberately perceiving it at this moment, he was finally able to determine that his opportunity to break through his cultivation this time was not obtained by chance, but because there was a special energy in this space, which made his cultivation that was about to break through finally show signs of loosening.

As for what this power was, and what its true effect was, he didn't know this, and he couldn't absorb it for his own use.

In this regard, Luo Song secretly said in his heart that it was a pity, but he was not an insatiable person, he was already very satisfied with the opportunity to break through his cultivation like this, if he bothered about the gains and losses of this kind of energy, he would only make trouble for himself, which would not be a good thing for him.

After investigating for a long time, Luo Song realized that this space was very small, only about a radius of more than ten miles, except for the place surrounded by mountains, that is, a river flowing out of an unknown place, and it also flowed to an unknown place, and the river in this space was just passing through this place.

For this small river, Luo Song has also investigated for a long time, but whether it is the water quality or some of the creatures living in it, they are all very ordinary, so ordinary that they can't be more ordinary, and they don't even stick to a little aura.

It looks like the creek is normal, but the more it is, the more abnormal it becomes.

If this river is on the earth, it is definitely the most normal, after all, the thinness of the aura on the earth is negligible, whether it is animals or plants, or those lifeless existences, almost none contain aura, this is the most normal performance.

But in the realm of the underworld, there are almost few rivers without aura, no matter how thin the aura is, it is impossible to have it at all, after all, the aura between heaven and earth will more or less be integrated into the mountains, rivers and trees.

In this space, although the intensity of aura is not as strong as in the imperial capital, it is definitely much richer than the outside world, and in such an environment, there will be no aura in drinking water, which is definitely abnormal.

In order to verify the strangeness of the river, Luo Song took out a medium-grade spirit sword magic weapon and threw it into the river with a wave of his hand.

The moment the spirit sword entered the water, it was as if water droplets fell into the molten slurry, and it was corroded into a large amount of white gas in an instant, and then disappeared without a trace, and Luo Songna was extremely shocked to see it.

"This river is a ......"

Luo Song's heart moved slightly, and he hurriedly took out a three-inch-long silver needle from the storage bracelet, which was a medium-grade spiritual weapon.

He glanced at the silver needle in his hand, and then at the river below him, and when he let go of his fingers, the silver needle fell directly into the river.

When the silver needle entered the water, it did not melt like the previous spirit sword, but sank to the bottom of the water all at once, but there were bubbles floating up from the bottom of the water, and its source was the silver needle that sank to the bottom of the water.

In about three breaths, the silver needle that sank to the bottom of the water was completely corroded, and it was dissolved into nothingness like the previous spirit sword, which made Luo Song's eyes widen, but there was an irrepressible excitement in his eyes.

Not to mention the spirit sword of the medium-grade magic weapon before, the silver needle is a medium-grade spiritual weapon, but it is still corroded by the river water in the time of three breaths, which shows the horror of the river, and it is no wonder that there is no aura in this river.

As for the origin of the river, Luo Song had already determined seven or eight points in his heart, but in order to completely verify the conjecture in his heart, Luo Song immediately sat down cross-legged, forced out three drops of essence blood from his fingertips, and quickly pinched the spirit trick with both hands.

The three drops of essence blood that were originally suspended in mid-air, as Luo Song played a spiritual trick and integrated into it, the three drops of essence blood were like turning into a three-headed blood dragon, rotating around each other, and finally fused together, turning into a mysterious blood-colored spirit pattern, hanging in the air, exuding a different kind of blood-colored light.

Looking at the blood-colored spirit pattern in mid-air, Luo Song's heart moved, and this blood-colored spirit pattern twisted and changed for a while, and finally turned into a blood-colored cone thorn, shooting directly into the river.

The blood-colored cone pierced into the water, and it was not corroded by the river like the previous spirit sword and silver needle, but directly inserted into the bottom of the river, and the blood light emitted on it was even more brilliant, as if it was pouring hot fire oil on top of a flame, making the blood-colored cone thorn rise sharply, as if it was about to burst out with the most amazing power.

The moment the blood-colored cone light lit up, its blood-colored brilliance quickly dimmed, and when the blood-colored light on it completely disappeared, the blood-colored cone under the water was also melted away, and the river was still as calm as before, as if nothing had happened.

Seeing this, Luo Song's originally puzzled face showed a look of determination, because he was already completely sure of the origin of the water in the river in front of him.

"Nine Yin Water, I didn't expect it to be Nine Yin Water, and this river water is all Nine Yin Water, this ...... This is completely the Nine Yin River!" Luo Song looked at the river in front of him with an incredulous face.

Don't look at the plain river in front of you, even if it is a person as strong as Luo Song, once he falls into this river, within a moment's effort, he will be corroded by the river to the point that there is not even a slag left.

The Nine Shadows Yin Water is almost extinct in the Realm of the Netherworld, but its name is known even to Xiaobai who has just stepped into cultivation, because it involves a catastrophe that happened in the Realm of the Underworld tens of thousands of years ago.

Tens of thousands of years ago, a demon suddenly appeared in the Netherworld, and the demon called himself the Nine Shadows Ancestor, and since his sudden appearance in the Netherworld, it was a natural disaster and man-made disaster for anyone and forces in the Netherworld.

The Nine Shadows Ancestor kills people without blinking, and in order to cultivate demonic skills, he has to kill 9,999 people every day, using blood to sacrifice heaven and earth, and condensing a terrible substance called Nine Shadows Yin Water.

Before the appearance of the Nine Shadows Ancestor, there was nothing known about the Nine Shadows Yin Water in the Netherworld, but since the appearance of the Nine Shadows Ancestor, the terrifying things about the Nine Shadows Yin Water have also been remembered by the people who have passed through the Netherworld.

According to ancient records, this Nine Yin Water has the terrible ability to corrode all things, whether it is a tangible substance, or an invisible energy and existence, the Nine Yin Water is still corroded, just like the magic weapon just now, and the blood-colored cone thorn turned into Luo Song's essence blood.

The reason why the Nine Shadows Ancestor was able to turn into a demon and penetrate the underworld was almost invincible was because he could control such a terrifying thing as the Nine Shadows Yin Water, not to mention a cultivator of the same level, even if he was a person who was much higher than his predecessors, once he was touched by the Nine Shadows Yin Water, he would die.

Only the legend that the existence of a half-immortal who is infinitely close to the cultivation of the fairy realm can resist the corrosion of the Nine Yin Water.

But it is only to resist, if it is surrounded by a large amount of Nine Yin Water, even a half-immortal powerhouse will have to fall, and it will be corrupted by the Nine Yin Water.

At first, the Nine Shadows Ancestor didn't know that outsiders were killing people, but with the confrontation with the Nine Shadows Ancestor, the world gradually discovered the secret of the Nine Shadows Yin Water.

In order to continue to master the Nine Shadows Yin Water, the Nine Shadows Ancestor must obtain the blood sacrifice of 9,999 people every day, in the mysterious void, summon the Nine Shadows Yin Water and control it in his hand, and the time limit for use is only one day, if he wants to continue to control it, he must re-sacrifice 9,999 people.

In order to obtain infinite power, in order to dominate the entire Netherworld Realm, in order to reach the pinnacle of cultivation, the Nine Shadows Ancestor was completely crazy, and the blood sacrifice of nine hundred and ninety-nine people became an 'ordinary' thing he did most every day.

Most of the people who sacrifice blood are mortals who have no cultivation, but monks also exist, as a monk, they have nothing to do with themselves, but the Nine Shadows Ancestor masters the Nine Shadows Yin Water, as well as its ferocious nature, and the fool knows that when he really grows up, the entire Underworld will be in his hands.

Moreover, there are 9,999 people who are sacrificed by blood every day, and once the time is too long, maybe the entire Underworld will be sacrificed by him, and then the Secret Realm will be truly destroyed.

Whether it is for their own safety, or to explore and grasp the secrets of the Nine Shadows Yin Water, all the creatures in the Netherworld, regardless of power and race, unite to fight against the Nine Shadows Yin Water of the Nine Shadows Ancestor.

It can be said that during that period, the Nine Shadows Ancestor alone set off a war through the underworld.

And this war was extremely tragic, it lasted for three years, and the Underworld Alliance wiped out the Nine Shadows Ancestor, ordered to put an end to all things about the Nine Shades of Yin Water, and issued a death order, that is, in the Underworld, no matter who or what race, once they practiced the exercises about the Nine Shades of Yin Water, or the idea of fighting the Nine Shades of Yin Water, they would be the public enemies of the Underworld.

Because of the fall of the Nine Shadows Ancestor, coupled with the eradication of the entire Netherworld, the Nine Netherworld Yin Water has become a taboo in the Netherworld, and anyone who is involved in the Nine Netherworld Yin Water will be wiped out, without exception!

But there are still people desperate to try to get such a terrifying thing as the Nine Shadows Yin Water, and if the matter is revealed, it will be wiped out by all the forces in the secret realm.

Among them, the most famous is that more than 10,000 years ago, the two deputy alliance leaders of the Tongtian Star Alliance obtained some Nine Yin Water, but did not destroy it, but secretly hid it and used it to cultivate evil magic weapons.

This matter was finally revealed, and the alliance leader of the Tongtian Star Alliance showed no mercy, and directly killed the two deputy alliance leaders.

And the forces of the two deputy alliance leaders, whether they knew it or not, were also exterminated at the same time.

It is better to kill by mistake than to let go, this is the attitude of the Tongtian Star Alliance towards the Nine Shades of Yin Water, and it also reminds the entire Underworld that no matter who it is, what the forces behind it are, once it involves the Nine Shades of Yin Water, it is impossible to escape the punishment of extermination.

For the danger of the Nine Shadows Yin Water, Luo Song was not only himself, but also from the entire secret realm.

But for Luo Song, this Nine Yin Water is an unprecedented creation, and it will even affect his future cultivation path, not to mention the Nine Yin Water of a whole river, not to mention Luo Song, even if he is the leader of the Tongtian Star Alliance, I am afraid he will not be able to stand such a temptation.