Of course, theoretically speaking, material elements do not necessarily need to be absolutely pure in order to form a special energy field. However, judging from the fact that the Ocean Country is blind to materials, especially the internal structure of the Heavenly Materials and Earth Treasures, and the extremely backward material research capabilities of the Sea Countries, it is impossible to use mixtures to directly make similar Heavenly Materials and Earth Treasures, or simply copy the Heavenly Materials and Earth Treasures.

In other words, as far as the current situation is concerned, only using a substance that is close to absolute purity to make materials with an internal energy field is the simplest thing, and it can be said that it is a shortcut.

And for these astral magicians who have already mastered a certain amount of elemental knowledge, but are far from proficient, it is naturally the only way they can think of at present.

As for material experts like Bai Xing, although in terms of theoretical knowledge and practical experience, they are much more capable than these astromagicians in the field of materials, but because they are just ordinary people with average ability, even if they have imagined that it is possible to use absolutely pure substances to create the special materials that Xin Yu needs, it is not so easy to purify the matter to the point of absolute purity.

Not to mention the extremely rudimentary test conditions of the Ocean Country, even the most advanced materials laboratory on the earth in Xin Yu's previous life did not have the ability to refine absolutely pure substances. On the one hand, the test device itself is not advanced enough to achieve absolute purification, and on the other hand, the backwardness of the test method, that is, the purification method, also makes it impossible for absolute purity to exist. In addition, there is no absolutely pure experimental environment, and impurities cannot be avoided during the experiment.

However, these difficulties are very easy for astromagicians to do.

First of all, the experimental equipment is backward, for the astromagicians, they do not absolutely need equipment to refine the substance, although the conventional smelting furnace, even the most backward smelting furnace is more efficient than the astromagician's research, but at least for the astromagician, they can use spiritual power to operate at the microscopic level.

The second is the experimental method, although whether it is a physical method or a chemical method, in terms of production efficiency, it is much faster than the astrological magician who uses mental power to "transport" molecule by molecule. However, it is impossible to achieve absolute purity whether it is ordinary powder smelting, that is, physical methods, or chemical reaction "extraction" methods to eliminate impurities.

That is to say, although the method of purification carried out by the sorcerer with spiritual power at the onlooker level is very stupid and inefficient, and does not have the value of industrial promotion, in terms of quality, it can definitely achieve the purpose of purifying pure matter.

As for the issue of the environment, that is, the construction of a clean space. If it is in a vacuum, it is impossible to have absolutely no space...... Of course, this means that in normal space, if it is said to be in subspace, this term is not suitable. However, the environment in space is definitely much cleaner than the interior of the planet, and through some special methods, it is still possible to artificially create an absolutely dust-free space.

That is, for what backward scientific and technological civilizations cannot do...... Note that it is a backward scientific and technological civilization, and if the degree of scientific and technological civilization is high, it is also possible to purify absolutely pure elemental substances or compounds...... For astral magicians, especially for these twelve astrals, all of whom are high-level, if they work hard, they can still do it.

If it weren't for Xin Yu's slave status, if it weren't for Xin Yu's clear "order", these twelve astral magicians would not be like burning their eyebrows, after just learning about the speculation about the properties of pure things from material experts such as Bai Xing, not to mention confirming that they can theoretically make materials similar to heaven and earth treasures, even if they are not very clear about the characteristics of pure materials.

In other words, when these twelve star magicians flew into space, they were completely trying their luck, and they didn't know if they could succeed or not.

It's just that because Xin Yu's requirements are relatively "strict", perhaps for those ordinary material researchers, he will also take into account the actual situation, and will not be too "difficult for strong people", even if it is to show his "generosity" and "leadership style", he will not quietly demand that he must succeed.

However, the identities of these twelve star magicians are different, they are simply Xin Yu's slaves, and the will of their masters is impossible to violate...... If they had the courage to "be willing to cut their bodies and dare to pull the emperor off the horse", or dare to "break the jar" and let the oath backfire on themselves, it would be impossible for them to succumb to Xin Yu's "claws" and be forced to become other people's slaves.

Naturally, in such a situation, they "have to do it if they can't do it", anyway, now they have no other way to think about it, if their research work has not made progress before Xin Yu is out of the customs again, they can't afford the consequences.

Perhaps, material researchers like Bai Xing, who are ordinary people, can still be forgiven by Xin Yu, after all, it is beyond their ability to create materials similar to heavenly and earthly treasures. But for these slave astromagicians, Xin Yu shouldn't be too polite, right?

It's not that Xin Yu is really so violent, it's just that these twelve star magician slaves themselves are not familiar with Xin Yu's character, naturally for the sake of safety, they don't dare to take risks, and if there is a task that they hope to complete, even if there is only a little hope, they must go all out and strive not to be punished by Xin Yu, the master.

In addition, although Xin Yu has not been around for long since his debut, his record is extremely terrifying. Maybe a few years ago, he just killed a Wu Killing Star who broke through the Sky Realm, and then cleanly erased a Du Yuquan in the subtle realm, at most, he had a fight with Zuo Tianya of the Heaven Splitting Realm, although all the star magicians knew that he was in absolute power at that time, but the final result was just a winless draw.

However, in the past two years, especially in the recent stage, Xin Yu's decisive methods have made almost all astral magicians feel a chill. First of all, when he was not clearly at war with the Small Forces Alliance, he successively killed many of the Micro Star Magicians in the Small Forces Alliance, and then wiped out the top combat power of the Small Forces Alliance in one fell swoop by desperately consuming excessive mental power. And after returning, in the face of the "encirclement and suppression" of most of the forces in almost the entire astral world, he still strongly killed Zuo Tianya, who was the first to come out.

You must know that Zuo Tianya is a big guy in the Heaven Splitting Realm, generally speaking, after reaching the Heaven Splitting Realm, because he has the ability to tear through space and teleport, it is basically difficult for such an astral sorcerer to be killed by a cultivator who is not much higher.

But Xin Yu did it even when he was extremely weak, although there were great star magicians like Chen Linqiang to protect his safety, but at that time, Chen Linqiang just ensured that the rest of the star magicians would not attack Xin Yu in groups, but he did not help Xin Yu share any attacks and a trace of pressure from Zuo Tianya. At most, it gives Xin Yu the confidence to be sure of his own safety, and he can attack without worrying about being killed by Zuo Tianya's accidental attack.

In other words, Xin Yu's confrontation with Zuo Tianya at that time was completely completed by his own ability. Being able to destroy the Star Warlocks of the Heaven Splitting Realm under the condition of extreme weakness can imagine how strong Xin Yu's strength is.

And the strength of these twelve star magicians, the highest is only the subtle high level, not to mention that they are still bound by the oath, even if there is no such factor, when Xin Yu comes out again, with Xin Yu's strength, it will definitely be effortless to kill these slaves who are far inferior to Zuo Tianya...... Maybe they don't need to recover to any extent, even in the current situation, Xin Yu can put these guys who are not up to the same strength as they want.

With such a master who is relatively murderous and powerful, how dare these twelve astral sorcerer slaves have the idea of perfunctory Xin Yu? Even if they use the method of stacking spiritual power to create pure elemental matter by using the method of accumulation of spiritual power close to one molecule at a time, the amount of tasks is huge, and the work is so complicated and boring that people who can definitely bring their nerves to the limit will also feel collapsed, but these twelve guys do not dare to have any slackness, and use almost their own maximum limit to try to persist in doing this work.

Speaking of which, Xin Yu really didn't have that unsympathetic attitude, although these twelve star magicians were his own slave status, and they were almost at his disposal. But he really didn't think about how to punish these guys if they couldn't complete the tasks they had been given.

Of course, these twelve slaves imagined their masters to be so "evil" and formed a kind of "sick" fear, and Xin Yu would not pretend to be kind to explain or talk to them or anything. Because, first, people get along with each other, and only after a long time can they understand each other. That is to say, the so-called "Lu Yao knows the horsepower, and the people will see the hearts of the people over time", and it is impossible to change the preconceived and ingrained thoughts of these twelve astral wizard slaves about him. This is the most important point, since Xin Yu is the master, can he put down the shelf and talk to these slaves in a fake way? Or can these slaves' feelings towards Xin Yu as the master change the fact that they are slaves? Since they can't be changed, what can the impact of good or bad perception?

Perhaps, because of the fear of Xin Yu by these twelve astral wizard slaves, it can also increase their work efficiency, just like now, without Xin Yu urging anger, they can give full play to their subjective initiative, endure hard in space, and strive to purify the ordinary metal materials they brought with them to the point of being as pure as possible, in the hope that they can obtain special materials with energy fields to replace heaven and earth treasures.

In fact, with the ability of an astrologist, if they didn't focus on the microcosm world cultivation, it would be impossible for them to use their spiritual power to control the precision at the molecular level, that is to say, they couldn't have extremely strong spiritual power like Xin Yu, and they could accumulate pure elemental matter molecule by molecule.

It's just that spiritual power can partially perceive the difference between atoms and molecules of different elements, that is, they can distinguish the impurities that do not belong to pure matter with their own spiritual power perception, and then use star power to eliminate them.

Speaking of which, this method seems to be simpler than stacking up large chunks of pure matter with the same kind of molecules, but unfortunately, the spiritual power of a high-level astrologist may be able to easily move mountains and reclaim the sea, but it is very difficult to destroy the intermolecular forces at the molecular level and eliminate other more "stubborn" substances mixed in with it.

Fortunately, those who can advance to the high-level star magicians are all people with perseverance and perseverance, although this work is very difficult, but these twelve star magicians are not afraid of difficulties, but bury their heads in hard work...... Although there is no such thing as skillful work, after nearly two months of work, they have finally made several elemental metals that are infinitely close to purity.

The reason why I say infinitely close is that although these astrologers can distinguish the difference between elements of different atomic weights, they cannot do it absolutely. Take the achievement of one of the Microstar Sorcerers, for example, after more than fifty days of hard work, he managed to refine a piece of pure iron the size of a basketball. However, although any advanced testing instrument can judge that its purity has reached 100%, there is no guarantee that there is really not a single other non-ferrous molecule or atom in it.

This kind of material, which is close to absolute purity, but is not absolutely pure, naturally cannot have the internal energy field that theoretically pure elements have. Therefore, after these twelve astral magicians completed their works, they were very disappointed to find that no matter how hard they tried, it was impossible to complete Xin Yu's task, and one can imagine what a huge blow this was for them.

It was at this time that one of the astrologists with more flexible brain meridians saw that their efforts were not reported accordingly, and then quickly thought of a way to verify whether the Absolute Pure Thing had an energy field...... It's not that his method is good, but if he can't prove that absolute purity can be used to replace the Heavenly Treasure, that is, to achieve similar characteristics to the Heavenly Treasure.

If absolutely pure matter does possess a special energy field, then their idea is indeed viable. If it's the other way around, then they're doing useless work at all. Because, if even absolute purity is not able to have a special energy field, then no matter how hard they try to purify, what they end up with is nothing more than a pile of waste.

And this so-called verification method is to use a special substance that is the easiest to purify, to purify the absolute purity