After entering the cave, Guo Xuhuan temporarily closed this formation barrier according to Tang Yiyi's command, so as not to let the demonic qi in the cave continue to escape.

Judging from the intensity of the demonic energy in this cave, I am afraid that the things that exist inside will not be simple.

Although Guo Xuhuan has the intention to deal with the hidden dangers here in Ludao Mountain, he does not want to cause bigger problems because of his own actions.

As for Tang Yiyi, he has been following closely behind his senior brother Guo Xuhuan, vigilantly around.

Her cultivation strength is still too good, and she has to rely on the protection of her senior brother to venture into the cave.

Along the way, the two of them were very vigilant, and they didn't say much, so they continued to absorb the increasingly rich demonic qi here, and also followed the direction of the demonic qi's change and flow, and went to the depths of the cave to find the source.

In this cave, various formation barriers are arranged on the rock walls everywhere, preventing the demonic energy here from seeping out through the rock walls.

And this is also the reason why Ludao Mountain has been ordinary for so many years, has not been affected by demonic energy, and has not been discovered by anyone.

But this time, there was so much demonic qi in the cave that the formation barrier at the entrance of the cave could not hold up and could not be completely isolated, which led to the overflow of some demonic qi.

Just that little bit of demonic energy attracted the sixth-order demonic beasts that passed by.

But because of the overflow of demonic qi, it touched the psychedelic formation outside the cave of Ludao Mountain, further blocking the demonic qi from spreading around.

It was precisely because of the existence of this phantom array that the amount of demonic qi that escaped was even less.

If there were no such defenses, isolations, and subsequent protection formations, I am afraid that this Ludao Mountain, as well as the nearby state cities, would suffer even more serious damage.

After all, such a strong demonic qi, in addition to attracting demonic cultivators, may also affect the cultivation of Dao cultivators and demonic beasts.

Once there are more Dao cultivators or demonic beasts, for the area of Ludao Mountain, for the Northern Regions, and even for the entire cultivation realm, the damage may be spreading.

This time, it was also a coincidence that when they passed by this Ludao Mountain, because the fifth-order evil wolf demonic beast and the sixth-order three-headed demon dog were able to discover the hidden problems more keenly.

And now that they are in the midst of demonic energy, and this demonic qi is getting stronger and stronger, Guo Xuhuan and Tang Yiyi, their faces have become very solemn, and they don't dare to relax their vigilance at all.

After passing several forks in the road, the two came to an open place.

Here, the demonic energy is so thick that it almost forms a fluid.

In the middle of this hall, on the table shrouded by another formation barrier, there was a magic sword with a scarlet body in it.

And this formation barrier was also filled with demonic energy like water flowing, constantly impacting the formation barrier, making this barrier already show signs of collapse.

Zhuyue Sword!

Guo Xuhuan and Tang Yiyi, they all recognized it at first sight, and the one inserted on the table, along with the scabbard, was constantly vibrating and trembling, and it was the Zhuyue Sword, one of the top ten magic weapons!

Seeing what was hidden in this cave, it was actually Zhuyue Jian, Guo Xuhuan and Tang Yiyi, and they were even more shocked.

Such a powerful magic weapon actually exists here in Ludao Mountain!

And, in this way, it looks like the Zhuyue Sword was sealed here before!

It's no wonder that a little bit of demonic energy leaked here can cause such a big movement.

If these sealing formations were completely destroyed, then, with the demonic qi of the Zhuyue Sword and the strong resentment above, I was afraid that the cultivation realm would usher in a great catastrophe!

In this regard, Tang Yiyi was even more silent, but his heart beat like a drum.

First the mountain trapping axe, and then the Zhuyue sword, why did such a powerful magic weapon appear in the cultivation realm?

Even, these are like being sealed in the cultivation realm of the Xuanlan Continent, or here in the Northern Regions.

Now, because of the passage of time, these sealing formations will begin to have problems, so that these powerful magic weapons will see the light of day again?

Seeing such a situation, Tang Yiyi always felt that the situation was about to get out of control in advance.

Especially when he thought of the previous observation of the formation barrier at the entrance of the cave, Tang Yiyi felt that there was a problem.

According to the law of the endless operation of the formation, there should be no problems with the sealed formation barrier.

Someone is clearly doing something about it.

If you move these hands and feet, the formation barrier will slowly become weak over time, and there is a chance that it will be directly overwhelmed by the power of the magic weapon.

In addition, as long as someone continues to use their hands and feet on these formation barriers, according to the law of time, it will accelerate the collapse of these formation barriers.

It's not easy, but who's doing it? It's been holding on for so long.

Soon, Tang Yiyi had already thought of a possibility.

This made her even more nervous.

If that's the case, then a lot of things make sense.

The natural and man-made disasters she used to think were actually just those people who carried out their plans regularly!

Thinking of the chaotic and terrifying situation later, Tang Yiyi lowered his eyes slightly.

She needs to sort things out again and think it through thoroughly.

At this time, Guo Xuhuan's brows furrowed tightly, and he raised his hand to feel the demonic qi escaping from the isolation barrier in front of him.

Looking at the thick demonic qi in the palm of his hand, Guo Xuhuan's frowning brows never let go.

He, naturally, also sensed that things were not simple.

Such a strong sense of crisis, which he had never experienced before, made him feel a little flustered.

After a while, calming down a little, Guo Xuhuan turned his head and looked at his junior sister Tang Yiyi.

Noticing that the junior sister was also equally serious, Guo Xuhuan hesitated for a while, but then asked first: "Senior sister, is there a way for the junior sister to deal with this Zhuyue sword?" ”

"In the Mixed Yuan Formula, there should be a way to deal with magic weapons, especially this powerful magic weapon."

"It's a pity that the inheritance of the hybrid element recipe on my side is not complete, I only know that there is such a method, but I don't know how to operate it."

"If you want to subdue this Zhuyue Sword, it seems that you still have to rely on your junior sister."

"Only by finding a way to solve this Zhuyue Sword can the demonic qi in this place be completely cleared, so as to avoid affecting other places and causing greater harm."

Noticing that Senior Sister was looking at him, Guo Xuhuan sighed softly and continued: "Senior Sister, this is not a simple matter, but I have a very bad premonition, if we don't deal with this Zhuyue Sword this time, and don't deal with such a strong demonic qi here, I'm afraid that the consequences will be unimaginable." ”