took the few copies of the "Refining Codex" given by Ruojing, and the first thing Yue Yu turned to was the spirit soldier chapter in it. In fact, at this moment, he can learn the content through those memories in his brain. However, or because of the habit he developed since he was a child, as long as he has the conditions, Yue Yu still likes to hold a book of things to study, he always feels more like this, and it is easier to burst out of inspiration.

And the beginning of this refiner is to introduce the weapon level of this world. In the past, Yue Yu only knew that there were ordinary weapons, foreign soldiers, treasure soldiers, and spirit soldiers in this world. Usually under the treasure soldiers, it is very rare. And the genus of the spirit soldier is even rarer, the authors of those travelogue miscellaneous books in the Yue family's library, as well as some famous forgers in the clan, are basically only known by name. Even the innate martial arts powerhouses such as Ruxian Yu Pingna only used a fourteenth-level Ying Yue sword, which shows the rarity of its things.

However, according to the person who wrote this "Refining Codex", above the fifth-level spirit soldiers, there were also nine-rank Xuan soldiers! And this refiner, who was extremely well-known in his casual cultivation, had only refined an eighteenth-level spirit soldier for the rest of his life.

——The difficulty of refining this immortal blade is far above that of magic weapons!

Yue Yu was surprised at first, but when he turned to the back of this spirit soldier chapter, he was relieved. In fact, the usual sword-making methods in the mortal world, by the time they reached the fifteenth level of treasure soldiers, their strength had basically reached an extreme. Ordinary utensils are already difficult to harm. And the so-called spirit soldiers have not improved much in this regard, it lies in the rune secret method!

Carving various talismans into various weapons, so that after the true qi is infused, it can send out all kinds of secret methods, or have all kinds of strange abilities.

Generally speaking, the more secret methods and abilities you have, the stronger and stronger you are, the higher the level of this spirit soldier. And the Bingyi Bow that Yue Yu got from the clan before, strictly speaking, can be regarded as a spiritual soldier's surname. It's just that in this world, it is relatively rare to engrave a rune secret method on a bow that is less than thirty stones.

Some people may still ask at this point, this seems to be no different from those magic weapons and the like. But the problem is that the function of the ritual instrument is only an auxiliary role. It is easy to engrave all kinds of talismans in the blade, but if you want it to not be destroyed in the fierce collision, you must put some effort into adjusting the structure of each weapon. So as not to cause the weapon to collapse due to too much force during the battle!

And if you take into account the materials, the requirements of the spirit soldiers are also extremely harsh. The difficulty of refining a sixteenth-level spirit weapon can be said to be no less than that of a third-grade magic weapon. And in terms of value, it's usually more than three times that of the latter!

In addition, it is also mentioned in the book that those Xuan soldiers above the spirit soldiers are no longer the sword-making methods of the mortal world at all. Either find the earth's heart and lungs fire, or find more than 100,000 meters above the peak, and use the sun true fire refining weapon to practice swords.

However, these two refining methods, even this senior who wrote the book, had only heard of them. Whether it is the fire of the heart of the earth or the true fire of the sun, below the Jindan period is to touch and die, where can it be borrowed?

Thankfully, under this, cultivators still have a method to borrow. That is the samadhi true fire power that is obtained after the period of spiritual weakness. Although it is inferior to the first two in terms of grade, it is better than the purity of firepower, and if it is a tool for its own use, it is more than a few spiritual surnames. However, the difficulty of this method lies in the fact that it requires years of samadhi true fire to use refining and purifying materials. It often takes decades for a Xuan soldier to collect materials and complete a weapon.

And that refiner, although he had broken through to the cultivation of the heartbeat period throughout his life, he was already running out of time at that time, and naturally he had no experience to talk about in this regard.

However, this spiritual void and heart movement period, as well as the sun true fire samadhi true fire, is still quite a distant thing for Yue Yu. The most difficult thing for him now is that the difficulty of forging the spirit soldier is beyond expectations, although there are many materials collected this time, it may not be able to build it successfully. Although his analytical ability is strong, he is not omnipotent—it took him half a day to carefully read the spirit soldier chapter in this refining codex. Yue Yu fell into the regular test again, and it was not until he used the auxiliary intelligence system to roughly set up a few weapons in his brain that he went to find Zhang Yuanzhe again, preparing to borrow a forging shop from the Zhang family.

-- His auxiliary intelligent system has this advantage, and it is difficult for others to design a perfect weapon structure in this era. He used modern theories of mechanics and easily got results. Of course, this is also related to this parasitic system, after he broke through the innate nature, the computing power increased by more than five times. And at present, with the improvement of his physique, the improvement in this area has not stopped.

However, his first draft design was limited to mechanics. After carving the talisman, whether the weapon can be impacted by the spiritual power when the secret method is activated without being damaged depends on his on-the-spot performance. After all, the few newly engraved secret methods taken from the runes of the "Elementary Rune", although he had learned it before, he had never had the experience of using it.

"—You want a well-equipped forge with tools and facilities, and you have to clear it?"

When he heard Yue Yu's request, which was a little inexplicable no matter how he heard it, Zhang Yuanzhe's face was full of surprise and surprise that he couldn't hide for a while. However, he was not stupid enough to ask Yue Yu what he wanted to do in the forging room. The word "clearance" is enough to show that in this matter, Yue Yu has an attitude of not wanting people to know.

Just after thinking for a while, Zhang Yuanzhe didn't even hesitate at all, and began to arrange for Yue Yu. The Zhang family is inferior to the Zhu family in weapon production, but it is unique in terms of armor. A forging and smelting room in use, if it suddenly stops work for a few days in a row, the Zhang family will indeed lose a lot. However, compared to his nephew and Yue Yu's innate martial arts identity, it is nothing.

Even after Yue Yu walked into the forging room, Zhang Yuanzhe personally found more than a dozen martial artists and watched the outside for Yue Yu. He was not without curiosity, but he was reluctant to go deeper.

When Yue Yu walked into this room, the first thing he saw was the facilities inside. However, there was a hint of satisfaction and admiration in his eyes, it seemed that it was not for nothing that his uncle was able to become a close friend with his nominal 'father', and was always respected by Yue Zhang.

Not to mention the facilities, there are several tools and facilities that are not seen in the outside world. For example, the blower, the Yue family is still using something similar to an accordion, but here the piston principle is already used, and the wind is stronger and stronger. Zhang's defense has today's reputation, and I am afraid it has a lot of endurance.

And his uncle did not deliberately hide this, which shows that his real surname is indeed square and kind, although this is probably not a good thing for the Zhang family.

The first thing Yue Yu started to do was Ran Li's axe, this thing was huge, even if it was engraved with a rune, it was unlikely that something would happen. It can be said that the success rate is the largest, and it is the most appropriate to practice and accumulate experience.

First, the mold was cast, and then Yue Yu directly put the eleventh-level broken mountain Yue sent by the Zhu family into the furnace and melted it, and then poured it into the mold.

The materials used for this broken mountain are indeed excellent, but some of the metals are purely superfluous for the spirit soldiers that Yue Yu wants to cast. At this time, if it was someone else, or before Yue Yu's cultivation reached the innate level, there was absolutely no way to separate these ingredients from this fiery solution. However, at this time, Yue Yu could directly use the true qi that could already be released from the body on a large scale, isolate it and then extract it.

After that, the second procedure was to melt another part of the metal collected by Yue Yu and add it evenly. There is also a concentration of carbon, which also needs to be controlled in an appropriate range. These would have been done by forging in a thousand ways, but in Yue Yu's hands, it was an easy task.

The only difficulty is still the talisman, according to the "Refining Codex", the general practice is to engrave it. Or in advance according to the style of the talisman, the metal wire is made from a special material, and then the metal solution is poured into the mold and added to it. However, what Yue Yu chose was a method that had never been seen in this continent before, directly using the melted special metal to condense runes in the weapon, and dissolve it with other metals, which should have better resistance to spiritual impact and sturdiness.

In addition, there is the most important one, which can be said to be the fundamental 'spirit stone' of these spirit soldiers. This time, Yue Yu also scraped the only dozen spirit stones from the Yue family's treasury, and they happened to be able to use them at this time.

Looking at Yue Yu's busy figure, Yue Bingqian's beautiful eyes were full of puzzlement: "Brother Xiaoli, what is my brother going to do?"

"It's supposed to be building weapons, right?"

Hearing this, Ran Li first wiped a handful of sweat the size of beans on his face, and then smiled reluctantly. There was a bit of weakness in his voice, he was pulled by Yue Yu to be a coolie to stir up the bellows just now, melting hundreds of catties of iron, and he was really tired at this time.

Yue Bingqian blinked and didn't ask again, but the doubts in her heart still didn't subside.

She knew that Yue Yu was really second to none in the Northern Horse Plains in terms of refining medicine, and everything else was also learned as soon as she learned it. But this exercise technique has to be more than ten years of experience.

In addition, looking at Yue Yu like this, where does it look like he is forging and smelting? Isn't it normal for the family to build weapons in the iron shop?

Ran Li didn't continue to explain her doubts next, but watched Yue Yu's every move with a focused expression. Yue Bingqian didn't know that Yue Yu had asked for a refining book from Master Xi, but he was there to watch that day. Therefore, there is indeed a different kind of expectation for the giant axe that Yue Yu is building.

- So far, as long as it is what Yue Yu wants to do, he has never seen Yue Yu fail.

(To be continued)