Wu Xie really didn't expect that the eldest grandson would actually understand his heart at this time and take a crucial step from Ning Yuan to Huandan.

When his breath calmed down, and the whole person seemed to be asleep, Shaoguang Zhenren used the power of the Sky Survey Shenzhou to cover a solid defensive formation around him to prevent possible accidents.

From Ning Yuan to Huandan, you need to survive the heart demon tribulation. The Inner Demon Tribulation is not an external flame or thunderbolt, but an illusion born from the heart. In the midst of the inner tribulation, the monk will face his own thoughts, each of which will manifest a period of illusion, and only by sticking to his heart and passing through one illusion after another can he finally succeed in the tribulation.

The process of the Inner Demon Tribulation seemed to be very peaceful, and the monks who crossed the Tribulation seemed to be sleeping, but throughout the ages, I don't know how many monks in the Dao had been unable to wake up, and they lost their lives in a daze. Although some monks woke up by luck, they were not able to survive the catastrophe, but were affected by the demons in their hearts and fell into demonic thoughts.

A monk who has fallen into demonic thoughts will have a drastic change in personality and become the same as before. More commonly, it is extremely violent, killing fellow disciples and friends - this is because when crossing the heart of the demon, one of the most common demons is "all you see in front of you are illusions, just destroy them all......".

Once you fall into this kind of demonic thought, you will almost certainly fail. But if you don't have a brave and firm heart, you can't survive the demon calamity...... The subtle difference between demonic thoughts and Dao minds can never be understood unless you experience them yourself.

I don't know how many monks have left valuable experience according to the situation of the Heart Demon Tribulation, but even if they get these experiences, the chances of surviving this tribulation have not improved significantly-there are many people among the scattered cultivators who will desperately collect the experience of the senior monks after stepping into the peak of Ning Yuan, but with little success.

According to the ancestors of Qingyang Temple, if you want to survive the heart demon tribulation successfully, you must insist on cultivating your mind. Only a strong mind can help fight against the demons of the heart

The Theory of Innocence is recognized as one of the best methods for cultivating the mind.

But...... According to the general law, it is very difficult for the demon clan to become a pill. Because the lifespan of the demon clan is relatively long - a long lifespan is not necessarily a good thing, but it can also be a bad thing.

Too long a lifespan will give the demon monk a sense of detachment that is "independent of the years". However, this sense of detachment is wrong, because it is not the result of Taoist cultivation at all, it is just a natural lifespan.

When the demon monk crosses the heart and demon tribulation, there are two most common situations:

The first is to find that your lifespan has become the same as that of mortals, losing that leisurely bearing, and having to rush like a Terran monk. If you can't overcome this tense atmosphere, you will never wake up and run out of life in endless nightmares.

The second is to find that he has successfully crossed the catastrophe, but the situation has not changed, and he is still beyond the years. This will make the demon monk lose his determination to seek the Tao, and gradually give up the idea of seeking the Tao, so his cultivation will slowly dissipate, and he will turn into ordinary animals and plants again, and die.

In addition, there are many demon clan monks who will feel their beast instincts again when they cross the heart demon tribulation, especially those whose body is a fierce beast poison, and they will almost certainly be aroused by the vicious aura in their nature. If you can't get past this level, you'll revert back to becoming a vicious monster - obviously, this is also a case of failed tribulation.

The reason why Shaoguang Zhenren laid out that defensive formation was to prevent others from disturbing Changsun Wu's tribulation, and on the other hand, it was also to prevent him from failing to cross the tribulation and turning into a demon beast.

Though...... The likelihood of the latter is very low.

"You have so much confidence in your eldest grandson, Uncle Ancestor?" Wu Xie was stunned for a moment, and asked curiously, "Does he belong to the type that is particularly easy to succeed?"

"How is that possible!" Shaoguang Zhenren smiled, "The heart demon tribulation is uncertain, and you can only rely on Dao Xin to face it." I'm not a roundworm in his stomach, how can I know if his Dao heart is strong or not? I'm just saying that it's unlikely that he will fail to cross the tribulation and become a monster. ”

"Can you tell me what it's for?"

"This one...... This is his own privacy, and when he succeeds in the robbery, you can ask for yourself. Shaoguang Zhenren snorted and said that he would keep it a secret, "If he can survive the inner demon tribulation, he will definitely not take this matter to heart anymore - but if he fails, it means that he may take this matter very seriously......"

Wu Xie suddenly realized and stopped asking.

Eldest Sun Wu began to cross the catastrophe, and the things he was responsible for naturally had to be stopped. But how could the design work of the Great Array be stopped! Therefore, Pillow Stone Zhenren simply handed over the task of designing the large array to Wu Jie.

"Me? I'm afraid I can't!" Wu Xie was taken aback and hurriedly refused, "Wouldn't it be better for this kind of large-scale formation to be designed by the ancestors?"

"Among all the monks of this sect, except for the eldest grandson, you are the only one who understands the Spiritual Heaven Fire Sect. So although your cultivation is indeed a bit low, it is the only choice in front of you. Pillow Stone Zhenren didn't save face for Wu Jie, and said with a smile, "Anyway, you work hard, if you don't have enough manpower, come to me, and I will help you arrange helpers - even if you want to ask the two uncles to help!"

With the guarantee of the real person in charge, Wu Xie put aside his worries and concentrated on thinking about how to design this formation.

According to Changsun Wu's conception, this big array is actually to connect the mana of many monks in the Immovable Fire Realm, and with Changsun Wu himself as a link, the power of continuously transforming it into the Fire Ministry's Fa is transmitted to Wu Jie, and then Wu Xie will launch various true transmission methods in the Fire Ministry's Fa, and then Changsun Wu will transform the effects of these Dharma decisions into the types that each monk can exercise properly, and feed them back.

There are actually not many formations designed in this way, but those formations have the shortcomings of monotonous function and slow conduction, after all, it is very troublesome to convert different types of mana. And the formation designed by Changsun Wu is ingenious in using the Immovable Fire Realm as an auxiliary, and all kinds of different mana will pass through the corresponding structure in the Immovable Fire Realm, and when it is transmitted to him, it has already turned into the power of the fire system - when it is transmitted back, it is naturally the opposite.

The key to this design is actually how to complete the transformation means that can correspond to various mana. And this method changes with the nature of the flames that make up the immovable fire realm, and there are countless possibilities.

Eldest Sun Wu had not been able to design and perfect the formation before, because he wanted to design a transformation process based on the Red Lotus Karma Fire or the Heavenly Tribulation Thunder Fire, but this process was too advanced and far beyond the limit of what he could design—perhaps no one in the entire human world could design this process.

With Changsun Wu's experience, Wu Xie naturally wouldn't make the same mistake. So his first consideration was not the power or the might of the flame, but its "extensiveness".

If the vast majority of monks can comprehend and master this flame, then the design of the process will be much simpler, even Wu Jie, a cultivator who is refining gang, can design it......

Therefore, after consideration, Wu Xie chose to use one of the most extensive magical powers of the Daomen, "Samadhi True Fire", as the raw material for the construction of the Immovable Fire Realm this time.

The so-called Samadhi True Fire refers to the combination of "heavenly fire", "earth fire" and "human fire", and its sources are varied. The power of the samadhi true fire composed of different sources is also different, and it can even be said that it is ever-changing.

But this is only for the initiation monks, when the monk steps into the realm of refining Gang, with the continuous refining of the Gang Qi, the Samadhi True Fire in the body will also be continuously purified, and it will naturally develop in a fixed direction - that is, one of the most standard supernatural powers of the Dao Gate, the real Samadhi True Fire.

Of course, Wu Xie had already quenched the true fire of Samadhi, and among the monks who participated in this great array, his cultivation and age were most likely the lowest. Even if others don't convert to the fire system exercises, relying on the accumulation of years and the advantages of their skills, they should have already completed this transformation.

Therefore, the design based on the true fire of Samadhi should be able to adapt to almost all Taoist monks, and even many monks from the Xuanmen and even the Buddhist sect may be able to adapt to it.

After all...... Samadhi True Fire is a very useful supernatural power, and the alchemy and fighting methods of making weapons have their own unique advantages. Except for demonic monks who are not compatible with their natures, almost all monks will consider refining them in case they need it.

Once the direction is determined, the next step is to design the target. In this regard, Changsun Wu has already left a lot of information, and Wu Xie easily found several design plans with great reference value.

It's hard to start from scratch, but it's much easier with the basics. Taking the plan left by Changsun Wu as a reference, Wu Xie only took two or three days to design the preliminary transformation process.

When he handed over his design to Shaoguang Zhenren, who was good at formations, for review, Shaoguang Zhenren took him to Ancestor Fang. Only then did Wu Xie realize that Ancestor Fang was also a person who was good at formations - and his cultivation was even deeper than that of Shaoguang Zhenren!

"It's a good design." Ancestor Fang carefully looked at Wu Jie's design and nodded slightly, "The advantage is that the scope of application is very wide, as long as you understand the Samadhi True Fire, almost everyone can join this set of formations without any obstacles, so that the gain effect of the formation can be maximized." ”

But as soon as he changed his words, he became stern: "But, I want to tell you, this design is very stupid and naïve!"

Wu Xie was stunned, not understanding why he was saying this.

I just said that this design is good, why is it stupid and naïve?

"Wu Jie, it seems that you are not mentally prepared enough for the severity of our next battle!" Ancestor Fang shocked Wu Xie when he saw the words, sighed, and softened his tone a little, "This is not a small fight between you refining cultivators, but a shocking battle with Huandan monks as the main combat force!" In this battle, even the Ning Yuan Cultivators could only be used as a support, and the Refining Gang Cultivators couldn't help at all—if it weren't for the fact that the Heavenly Array needed to intercept the comet needed you, we wouldn't have brought you here at all!"

"In that case, all the design should be considered around our main combat forces. As long as we can increase our strength a little more, what does it matter if the cultivators at the Condensation Yuan and Refining Gang levels can get the gain or not? I can even say that it is extreme, as long as we can temporarily strengthen our combat power, even if it weakens the strength of the Ning Yuan and Refining Gang level cultivators, it is completely correct!"

"Your design is very good, if it is used in a battle at the Refining Gang or even the Condensation Yuan level, it can be called a perfect auxiliary formation. But you have to remember that the design concept of this formation is not to help those who are at the same level as you, or only one realm higher than you, but to help us monks!" Patriarch Fang patted Wu Xie on the shoulder and said gently, "Let's think differently, don't worry about whether we can adapt." We old guys are more capable than you can imagine!"

Wu Xie understood what he meant, let out a long exclamation, and nodded again and again.

He returned to his room and began to think about how he could devise a method that would enhance the combat power of the Huandan Patriarchs.

This design was already beyond his ability, but from this point of view, Changsun Wu's design schemes, which were very low-finished, flashed with an amazing light.

Obviously, Changsun Wu had already taken this situation into account.

This is not to say that Wu Xie is stupider than him, but because Wu Jie's cultivation is not high enough and his vision is not high enough. Changsun Wu is a figure who has already stood on the threshold of the Huandan realm, and his way of thinking is naturally closer to the Huandan ancestors; And although Wu Xie has been brave and diligent, after all, he has been cultivating for a shallow age, and he has not even reached the late stage of refining Gang so far.

Behind different cultivations are different accumulations, compared to these predecessors who have cultivated for hundreds of years, thousands of years, or even thousands of years, Wu Xie still lacks a profound foundation after all!

Fortunately, although his background is not enough, there are two companions with profound knowledge in the Heavenly Book World Realm.

"Master, you should have come to ask me a long time ago!" When Wu Xie asked Jasmine for advice, she puffed up her chest happily and looked beaming, "Although I'm not good at formations, this design is still very simple for me, and it can be completed easily!"

She did what she said, and it only took less than half an hour to come up with a complete set of design plans, and even directly made a formation disk that could be simulated and tested, as long as the mana was input into the array disk, the changes in the formation could be deduced, so that the monks participating in the formation could familiarize themselves with it in advance.

Wu Xie happily took over the array plate and experimented with great interest.

But after only one or two experiments, his smile froze on his face.

According to Jasmine's design, this formation will frantically extract any energy around it when it is operating, whether it is fire or thunder, whether it is blood or soul, as long as it is energy, it will not hesitate to extract it, and then transform it into pure true yuan and instill it into the monks in the formation.

This design is not not powerful, however, Wu Xie felt that if he handed over this design, he was afraid that not only would he not get any praise, but he would be immediately escorted back to the master and locked up for thirty or fifty years of reflection. The master may even invite a few high-ranking monks to recite scriptures for themselves every day to wash away the demonic nature in their hearts

"What kind of auxiliary formation is this! It's basically the Demon Gate Great Array, isn't it good?" He reluctantly said to Jasmine, "Can't you just change your mind a little bit and design the formation according to the style of our righteous path people?"

"Didn't I already design it in your style?" Jasmine blinked her big ruby watery eyes, looking very innocent, "If according to my usual style, it is rare to have such a good opportunity, I should refine both the good and evil sides plus the extraterritorial heavenly demons in that comet, and directly turn them into vitality tonics—with such a large amount of extra harvest, master, you will definitely be able to smoothly improve your cultivation to the Jindan realm!"

Wu Xie couldn't help but hold his forehead with his hand, feeling that the gap between his level and Jasmine was too big.

In his opinion, it was already full of demonic energy, and no matter how you looked at it, it belonged to the formation of the Demon Gate Zhenshan Great Array, but in Jasmine's opinion, it was something deliberately designed in the direction of goodness.

That guy of the Supreme God Monarch is really poisonous!

When Jasmine couldn't rely on him, he had to retreat and ask Du Xin for help.

"This ...... If you don't mind, I'd like to refer to the design concept of our formation. Du Xin looked at the design draft of Changsun Wu for a few minutes, and listened carefully to Wu Xie explain the concept of this formation, pondered for a moment, and whispered, "I think that our original formation can be used here." ”

Wu Xie was stunned for a moment, and after recalling it for a while, he understood what she meant.

Through the formation, the Huandan monks in the formation are connected, so that each other's strength and mind can be directly communicated, which can of course improve the efficiency of the battle to the maximum.

The idea was indeed tempting, but after careful consideration, he rejected Du Xin's proposal.

Although tens of thousands of years have passed, the incident of the Great Light God Sect must have caused a lot of trouble, and there may still be records in the secret materials of each sect. Suddenly come up with something like that...... It would be fine if his design was shot outright, if it could pass but be debunked when it was actually used...... I'm afraid it will bring unnecessary trouble to Qingyangguan!

He confessed his worries, and Du Xin naturally understood. So I had to retreat and try to improve the design of Changsun Wu.

While the two were discussing, Jasmine had also recovered from the depression of disappointment, and with the curious Du Ruo, the four-person group of the Heavenly Book World Realm gathered together to discuss how to design this formation.

"This formation...... It's really a bit unexpected...... "When Wu Xie showed the final design to Patriarch Fang for review, this Huandan Patriarch, who had cultivated for seven or eight hundred years, carefully looked at it several times, revealing a look of surprise and admiration, "Although Zhilu Dao is extremely talented in combat, you can be said to be a natural warrior, but I really didn't expect that you still have talent in formation!"

Wu Xie immediately blushed and hurriedly humbled a little.

This humility comes from the heart, because the main contributor to this design is Du Xin, and many of the designs, he only knows what they are, and he can't know why they are at all. Plus some of Jasmine's advice, although not very esoteric, but enlightening on key points...... To be honest, in this design, Wu Xie feels that his credit is probably less than 20%.

Even if Du Xin and Jasmine didn't mind and took the credit of others, he couldn't help but blush.

Ancestor Fang didn't know this, he looked at this design over and over again, and let out a sound of admiration again and again.

"It's amazing! With a slight modification of this, it can be used as a mountain gate array!"

On that blueprint, one small-scale formation after another is layered and linked to each other, forming a dazzling but beautiful composition.

The final design was named the "Heavenly Fire Array".