It took Zhang Yifan less than two months to resume foundation building. Returning to the foundation building period made Zhang Yifan breathe a sigh of relief, the twists and turns he has experienced over the years really make him a little complicated, and the next thing is to make some preparations for the valley.

The relevant elixir of the Sanyuan Pill was available in the medicine garden, although Jiu'er said that the elixir in the medicine garden was for him to pick, but Zhang Yifan still insisted on exchanging some of the best elixirs in the Qi refining period and some spirit stones at the same price as before, and Jiu'er no longer insisted.

Zhang Yifan had already told Jiu'er that he was going to go out of the valley after his cultivation was restored, and asked Jiu'er if he was willing to go out with him. Although Jiu'er was very reluctant and wanted to see the outside world, she said that she wanted to wait for her mother to come back, and she couldn't go out yet, and she would talk about it later.

Zhang Yifan didn't say anything anymore, but he was a little lost in his heart, he really had a bit of brother and sister affection for Jiu'er, and he had already been close to each other in the past few years and had established a deep relationship.

"It would be nice if there was a pill for building the foundation, so that I could help Jiu'er build the foundation. Zhang Yifan thought with some regret.

After restoring the foundation, Zhang Yifan could start to cultivate the Three Yang Thunder Technique and Yin Thunder Escape Technique attached to the True Technique. Although he couldn't cultivate in the past few years, he had been comprehending these two spells, and he had comprehended some of them before he started cultivating, and he only needed to cultivate and verify that he would gain something.

As expected, the two spells that were extremely difficult to cultivate before have now made some progress, and Zhang Yifan has comprehended some of the fur for the cultivation of the two spells, and he can be regarded as entering the door. It's just that it takes a long time to comprehend and cultivate if you want to succeed in cultivation, but Zhang Yifan is already very satisfied with this. The cultivation of these two spells is very difficult, and his cultivation qualifications are really not very good, so it is already very good to be able to get started.

In the following time, Zhang Yifan began to try to refine the Sanyuan Dan. This kind of elixir suitable for refining mana in the early stage of foundation building is very precious, mainly because it originally contained rare erysipelas, and it also has some effects on breaking through the bottleneck, so it is also very difficult to refine, and Zhang Yifan failed five times in a row when he first refined.

Later, he changed his mind, and some of the subtle steps in the original Dan recipe to ensure the reduction of erysipelas were removed or deleted by him, making it much less difficult to refine. After two more failures, it was successfully refined, and the number of newly baked Sanyuan Dan was one-third more than the original, but the quality was the lowest grade, almost a waste Dan.

Zhang Yifan didn't care about this, he soaked the pill in mysterious well water, and couldn't wait to take one.

The effect of the three-yuan pill he newly refined was only a cut worse than the three-element pill on his body before, which made him very satisfied.

So Zhang Yifan made persistent efforts to continue refining, and then his alchemy success rate gradually increased, stabilizing at the point where five furnaces succeeded in three furnaces. In this way, the number of Sanyuan Pills refined by Zhang Yifan was enough to make a small sect blush, reaching nearly five hundred.

This also consumed nearly eight layers of the main elixir for refining the Sanyuan Pill in the Nine Lotus Valley Medicine Garden, and for this reason, Zhang Yifan gave Jiu'er nearly a hundred mysterious well water to refine and purify the pill to nine layers and nine.

The elixir purified to the ninth layer of nine contains very little erysipelas, and it has almost no effect on the monks, and it belongs to the category of the best elixir. Zhang Yifan did this mainly to avoid that the special best elixir that was completely purified and purified would bring disaster to Jiu'er.

This method was obtained by him through repeated tests using new mysterious well water, and even the elixir on his body was basically this nine-layered nine-layer elixir, which was only completely purified when he took it. This is also one of Zhang Yifan's measures to use the mysterious well water flexibly after the mysterious well water will not disappear with the change of the bright moon.

Before, in the Wanling Mountain Range, the magic weapon on Zhang Yifan's body had been damaged. Now there is basically no defensive magic weapon that can be used on his body, and the only offensive magic weapon that he can use is a top-level magic weapon in the Fire Jiaoqi Banner. He needed to refine some magic weapons to meet the unexpected needs.

Over the years, Zhang Yifan has been practicing the way of refining weapons, and Zhang Yifan, the secret book of heavenly craftsmanship that Xu Ziwu handed over to him before, has been obsessed with it since he first studied it.

The Tiangong Secret Book is the core secret book of the Tiangong Gate, and only the heavenly craftsmen of the past dynasties can hold it. The secret book contains refining weapons, talismans, puppet techniques and other immortal cultivation skills, which are all-encompassing and exquisite.

Putting aside the art of talisman making and puppet for the time being, Zhang Yifan currently has no mind or time to study, and is only focused on comprehending the alchemy technique in the secret book.

The classics such as the essence of the Heavenly Gong Refining Weapon Secret Method that Zhang Yifan practiced before were originally from the Heavenly Crafts Secret Classics, so Zhang Yifan was not very difficult to practice.

The various esoteric and subtle refining techniques in the secret book have opened his eyes and benefited him a lot, including nearly 100 kinds of magic weapon refining methods with different functions, which are basically high-grade and above magic weapons.

Among them, there are seventeen kinds of the most subtle and powerful magic weapons, which are named Tiangong, all of which are top-grade magic weapons, and the Liuding Liujia Tiangong wooden plaque used by Xu Ziwu before is one of them.

It's just that the refining materials needed for these magic weapons are very cherished, and some even need magic weapon materials, and Zhang Yifan's current refining level cannot be refined, so he can only wait until his refining level is improved to another level in the future.

In addition, Xu Ziwu taught Zhang Yifan the 128-character supreme mantra of heavenly craftsmanship, after all these years of understanding, Zhang Yifan has some understanding, so that his understanding of the way of refining is more profound, and the level of refining is naturally rising. He believed that with his current refining level, he should be able to refine some top-level magic weapons relatively steadily.

For this one hundred and twenty-eight words of heavenly supreme mantra, Zhang Yifan did not really understand its cherishment until he was a little introduced, which can be said to be more important than the secret book of heavenly craftsmanship, no wonder it can only be passed on orally.

In addition, Zhang Yifan had a feeling that this supreme mantra of heavenly work might be extracted from the secret book of heavenly work, and the two were intertwined, and they were inextricably linked.

But he has not been enlightened, but he has this feeling, thinking that the realm has not arrived, before Xu Ziwu asked him to comprehend the mantra of this Tiangong Secret Classic, it should also be related to this, but he has not obtained, and there is no change in the Heavenly Secret Classic.

Zhang Yifan's hand flashed, and a golden jade slip and a bracelet with a delicate appearance and a treasured appearance floated in front of him. The golden jade slip is the Tiangong Tiangang Disha inheritance series of magic weapons prepared by Xu Ziwu for the Burning Sky Valley, which is sealed by the secret method of the Tiangong Unique Xuan-level Seal, and it is necessary to learn the corresponding solution before it can be opened.

The bracelet is a token of Tiangongmen, a symbol of the status of Tiangong in the past dynasties, and it is also a storage weapon. Because the bracelet was sealed by the Tiangong unique earth-level secret method, Zhang Yifan didn't know how big the specific space was. The bracelet contains precious items that the master has hidden throughout his life, and it takes a unique earth-level solution to open it.

The Tiangong Unique Sealing Secret Method is the method of sealing precious items in the Tiangong Gate, unless there is a corresponding solution, strong dismantling will only destroy the sealed things, which can be called mysterious.

The sealing tantra is divided into four levels: heaven, earth, xuan, and huang, and the conditions required to learn different levels of tantra are also different. Among them, the Heavenly Rank Tantra requires cultivation above the Jindan stage and the level of the Great Grandmaster of Heavenly Refining Weapons, and the requirements can be called terrifying. With Zhang Yifan's current cultivation and refining level, he has only learned the sealing secret method of the Xuan and Huang levels, and there is still a long way to go to master the earth-level sealing secret method, whether it is cultivation or the level of heavenly refining weapons, not to mention the heaven-level sealing secret method.

The Tiangong bracelet is not mentioned for the time being, and Zhang Yifan will not open it without confirming Xu Ziwu.

He looked at the golden jade slip, and after some complicated unsealing, he opened the seal attached to it. Zhang Yifan attached the jade slip to his forehead and checked it with his divine sense, and found that there were two sets of magic weapon refining methods recorded in it. The two sets of magic weapons are the Tiangong Tiangang series and the Tiangong Evil series, which are the inheritance series of magic weapons prepared by Xu Ziwu for the disciples of the Burning Sky Valley after spending half of his life and combining the refining methods in the Tiangong Secret Classics.

The so-called inheritance magic weapon is a subtle magic weapon that needs to be driven by secret law, and only qualified monks can use it and can be passed on. The set of inheritance artifacts is composed of multiple artifacts, which will have different degrees of power amplification in response to each other, so they are more rare and rarer.

The inheritance of a complete set of magic weapons requires a very high level of refining masters to be successful, and some even require the cooperation of multiple refining masters to refine at the same time.

Xu Ziwu's two sets of inheritance series magic weapons require at least two Tiangong refining masters to cooperate in refining before they can be successfully refined, and if you want to refine alone, you must refine the great master and need a very strong divine sense, almost reaching the divine consciousness level of a Jindan stage monk. With Xu Ziwu's strength, he alone could not refine it at all, so Xu Ziwu would be ecstatic to be able to find Zhang Yifan, a closed disciple with a body of fire refining.

The Heavenly Evil Inheritance Weapon is composed of a Body-Increasing Footwear Weapon, an Auxiliary Trapping Enemy Weapon, a Protective Inner Armor Weapon, a Protective Defensive Shield Artifact and an Attack Artifact, of which the Attack Artifact is a top-level Artifact, and the remaining four are high-grade Boutique Artifacts.

The style and function of the Tiangong Tiangang series of magic weapons are basically the same as those of the Earth Demon series, but the quality is higher, and the power has been upgraded to a higher level. Almost all of them are top-level magic weapons, and among them, attack magic weapons are even more top-notch magic weapons.

Each top-grade or top-grade magic weapon is very expensive, a set of Earth Demon Series Inheritance Magic Weapons needs to consume at least nearly eight thousand spirit stones worth of refining materials, while the Tiangang Series Inheritance Magic Weapon requires a staggering fifteen thousand spirit stones. This is still the cost of Xu Ziwu's optimized refining method, which was more expensive before.

In order to improve the strength of his disciples and strive to enter the six major sects of the Chu State, Burning Sky Valley has spent great effort and financial resources. The high-level leaders of Burning Sky Valley plan to refine thirty-six sets of Tiangang and seventy-two sets of Earth Evil, and it is estimated that it will cost at least one and a half million spirit stones, which is equivalent to the spirit stone reserves of nearly a hundred years in Burning Sky Valley.

Only the most core disciples of the Burning Sky Valley who have passed the assessment can obtain the opportunity to inherit the magic weapons, and there are only twelve places every five years, of which three have obtained the Tiangang series of magic weapons, and nine have obtained the Earth Demon series magic weapons.

The above information was stated by Xu Ziwu in the postscript, he was originally going to start refining after the completion of the Fire Sect's mission, which was an extremely mind-consuming event, and it was expected that it would take at least one or two decades to complete the refining.

Refining the Tiangong Tiangang Disha series of inheritance magic weapons is Xu Ziwu's lifelong wish, and Zhang Yifan very much wants to fulfill this wish for his master. But the refining conditions of these two sets of inheritance magic weapons are too harsh, far from what Zhang Yifan can refine at present, he can only put them for a while, and then talk about them when the conditions are ripe later.

With a slightly sad look on his face due to Xu Ziwu, Zhang Yifan began to take out some refining materials from the storage bag and prepared to start refining magic weapons.

Zhang Yifan already had a plan for which magic weapons to refine, because he had compensated him for some refining materials from the Fire Sect before, and he also had a considerable amount of refining materials after all these years of accumulation, so the refining materials for refining magic weapons were enough.

It's just that Nine Lotus Valley doesn't have the earth fire that can be used, and the fire source required for refining can only be provided by the refining platform, which will be weaker, and it will have some impact on some materials that are difficult to refine. However, he has advanced to build the foundation, and with the foundation building true fire, this is a more excellent fire source than the earth fire, although it cannot last because of the mana limitation, but it can be used as an effective supplement, so it is not a big problem.

Everything was in place, and Zhang Yifan entered a state of engrossing in refining magic weapons.