He Wuxian and the three of them hid their traces and breath, and advanced unhurriedly in the dark wasteland.

The three elders, whose beards are all white and fairy-winded, are more sophisticated and meticulous in their thinking.

Halfway through, a very important question suddenly occurred to him.

"He Gongzi, the forty-two demon heavenly kings, we don't know what they are planning in this dark wasteland. But since they have come here, it means that this pitch-black wasteland is very likely to be the site of the Tongtian River. ”

"But why, I can't see that there are traces left by the Tongtian River in this wasteland?"

He Wuxian didn't understand this question, and he was speechless for a while, not knowing how to answer.

He raised his eyes and looked around, looking closely with his senses, looking for some clues.

At this time, Bai Yan spoke.

"There's no need to look for it, you can't find the ruins of the Tongtian River in this wasteland. ”

"Because, this layer of pitch-black space is the whole river channel of the Heavenly River. It's just that the Tongtian River has dried up, so I can't see it. ”

As soon as these words came out, He Wuxian and the three elders were both shocked.

The area of the Pitch Black Wasteland is very vast and extensive, running from north to south for tens of millions of miles.

And its width is at least 30,000 miles!

A 30,000-mile-wide river!

Is there really such a wide river in the world?

He Wuxian and the three elders both felt incredible and unimaginable.

However, the shock in the hearts of the two slowly subsided, and they were relieved after thinking about it carefully.

The Tongtian River existed when the heavens and the earth first opened, connecting the Nine Heavens and the Netherworld, and it is the first sacred river in the Tianwu world.

Its length is endless, no one can guess, and its width is more than 30,000 li, which is understandable.

It didn't take long for the three of them to fly 30,000 miles away.

At this time, the three of them all stopped in unison, staying in the dark sky, hiding their breath more hidden.

Because, thousands of miles away in front of the three of them, in the pitch-black wasteland, there were more than a dozen movements of the Demon Heavenly King's activities.

He Wuxian quietly released his divine sense, and only after carefully sensing and probing did he see the situation ahead.

Forty Demon Heavenly Kings gathered in a circle, surrounding the wasteland for a radius of thousands of miles.

Every Demon Heavenly King sat cross-legged in the sky with a solemn face, his body shining with starlight, and his hands made Dao Law seals.

Obviously, they were casting a Dao technique, and it seemed that they were setting up a huge formation.

Although I can't see what kind of formation they are going to set up.

However, the area covered by that formation reached a radius of thousands of miles, which showed that it must be a super array.

Seeing this scene, He Wuxian vaguely understood that the conspiracy of the Demon Heavenly Kings was probably related to this unfinished super array.

The three of them didn't dare to act rashly, so as not to startle the snake, and use the Dao method of concealing the aura more perfectly, lurking in the dark sky.

He Wuxian secretly observed the super array with a radius of thousands of miles, wanting to see some clues.

Soon he saw clearly that the forty Demon Heavenly Kings who were in a circle were just assistants to cast the Super Great Array.

The core figures who really presided over the erection of the super large array and the formation were two very mysterious demons wearing black-clad cloaks.

The two of them were both young men, sitting cross-legged in the center of the super array, covered in the Heavenly Demon Mist, casting spells.

They seem to have some kind of treasure that hides their appearance and aura.

No matter how He Wuxian and the Third Elder probed, they couldn't see the true face and strength of these two mysterious people.

All around was silent, and time passed quietly.

Unconsciously, He Wuxian and the three of them had been observing for half an hour.

He and the three elders could be sure that all the Demon Heavenly Kings had set up formations here.

Other than that, the demons have no helpers and ambushes.

At the same time, the unknown super array also gradually showed its prototype.

A huge cage glittering with starlight shrouded an area of thousands of miles.

This is the foundation of the Unknown Great Array, composed of hundreds of millions of silver light flashing formation veins.

Even if they were thousands of miles away, He Wuxian and the three of them could feel that that formation exuded extremely powerful power fluctuations.

Even if this super array had not yet been built, they could already predict that this would definitely be a super-powerful Dao-level supreme formation.

He Wuxian and the three elders stared at the big array for a long time, constantly speculating and analyzing.

It's a pity that even though the two of them are very familiar with the way of formation, and they have seen and heard a lot, they can't see what kind of formation it is.

However, after observing for a long time, Bai Yan finally raised his eyebrows, and a cold light flashed in his eyes.

He Wuxian saw the change in his expression, so he secretly asked.

"What's wrong, Bai Yan, do you see any clues?"

Bai Yan nodded, and also replied: "If I expected it, this formation may be the survival of ten thousand demons!"

"Ten Thousand Demons...... Survival?"

He Wuxian silently recited these four words in his heart, secretly speculating about the function of this super array.

When the Third Elder heard Bai Yan's words, he was obviously stunned for a moment, and then said with a frown.

"The name of this formation sounds familiar, and the old man seems to have seen it somewhere. ”

The Third Elder frowned and pondered, and after recalling for a while, his face suddenly changed.

"I remember, that was 8,000 years ago. I saw the name of this formation when I was flipping through an ancient book in the library of the Ruyi Sect of this sect. ”

"It is said that this is an ancient formation that has been handed down since ancient times, and it has extremely strong effects. It can gather the Netherworld Demon Qi and the power of reincarnation between heaven and earth, increase the combat power of the demons several times to ten times, and quickly heal their injuries. ”

"The ancient books say that during the primeval war, the demon army used the Ten Thousand Demons Survival Array to obtain incomparably powerful combat power and shocking recovery ability, so that they were invincible on the battlefield and slaughtered hundreds of millions of warriors of our clan. ”

After listening to the explanation of the three elders, He Wuxian finally understood what kind of big array this was.

He subconsciously thought of a question.

"It won't be long before the dry Tongtian River will swell and bring the majestic power of reincarnation. ”

"Those demon celestial kings set up a great array of ten thousand demons here, is it to condense the power of reincarnation?"

The three elders and Bai Yan both nodded in agreement.

Other than that, there is no reason to explain what the forty-two demon kings are doing.

He Wuxian frowned, pondered hard, and asked suspiciously.

"But, what are they going to do when they gather the power of reincarnation?"

The three elders were also puzzled, and guessed with him, but they didn't have a clue.

Bai Yan looked down at the ground below with deep eyes, and pointed to a rock a hundred miles ahead.

"Behold, there is something on the ground from within the rock. ”

He Wuxian and the three elders looked at the chaotic stone bushes, and after taking a closer look, they saw the clues.

On the hard, dark rocky ground, there are always some crevices and ravines of dirt.

In some of the cracks in the rocks, there are scattered black plants that look like mushrooms.

Those black plants, only the size of a baby's fist, have no rhizomes and branches, and are pitch black without any luster, nor do they fluctuate in star power.

After careful investigation, He Wuxian found that only one nest would grow within ten miles, about three of these black plants.

If it weren't for Bai Yan's reminder, He Wuxian and the Third Elder would not have noticed this strange plant at all.

After all, they are almost the same color as the ground and rocks, and they are so inconspicuous that they are difficult to identify.

He Wuxian looked at Bai Yan and asked suspiciously, "This plant is a little weird, what is it?"

"Nether Holy Fruit. The corners of Bai Yan's mouth hooked up a sneer, and he said slowly.

In this way, He Wuxian and the three elders both understood.

"I see!"

"In this Tongtian River ruins, there is a small amount of Netherworld Holy Fruit growing. Nether Sacred Fruit is extremely rare, and its growth cycle is extremely long, requiring at least tens of thousands of years. ”

"The Netherworld Holy Fruit grows extremely slowly, and the Demon Heavenly Kings want to use the power of reincarnation to give birth to the Netherworld Holy Fruit in order to achieve their goal!"

He Wuxian's analysis was the Dao, causing the three elders and Bai Yan to nod frequently.

At this point, the conspiracy of the demon kings was finally uncovered by the three of them.

Seeing that the forty-two demon kings had already completed half of the establishment of the Ten Thousand Demon Survival Array.

He Wuxian and the three elders were very anxious, and they couldn't rush forward immediately to destroy this super array.

However, Bai Yan shook his head and motioned to the two of them not to act rashly.

"They are outnumbered, and if we rush forward recklessly, we will surely fall into a desperate situation. ”

He Wuxian and the three elders had to calm down and find another way.

"We can't just watch them carry out their plans, we have to stop them. ”

He Wuxian's expression was solemn, his eyes flashed with cold light, and he said to Bai Yan and the three elders.

"However, with the strength of the twelve of us, it is simply impossible to stop them. For now, I can only send a message to Tang Yinghao's alliance leader, and ask him to lead the Heavenly King powerhouses to support and jointly deal with the forty-two Demon Heavenly Kings. ”

The Third Elder and Bai Yan both agreed with his plan.

So, He Wuxian quietly took out a summoning jade slip, explained the seriousness of the situation, and sent it to Tang Yinghao.

After sending the summoning jade slip, the three of them lurked in the dark sky, hibernating, monitoring the movements of many demon kings.

Three minutes later, Tang Yinghao sent a reply.

He already knew that the matter was urgent, and he was leading nearly thirty Terran Heavenly King powerhouses to rush towards the Heavenly Wind Jungle at full speed.

It's just that they have just left Hukou Pass, and they are too far away from the Tianfeng Jungle.

I'm afraid that I won't be able to catch up with the Heavenly Wind Jungle for a while.

After receiving the information, He Wuxian looked at it, and his heart suddenly fluttered.

Seeing that the Demon Heavenly Kings in front of him had almost successfully set up the Great Array of Ten Thousand Demons, He Wuxian immediately crushed the communication jade slip.

"Forget it, don't wait for the Tang Alliance Lord to come to support!"

"We can't wait any longer, let's go destroy the big array!"

After that, He Wuxian carried the blood-drinking knife, burst out with ten percent of his strength, and rushed over first.

Bai Yan also opened the Nine Dragons Ding, letting Crimson Yunxiao and the other nine heavenly kings come out, and everyone rushed to the Ten Thousand Demons Survival Array together.