There are all kinds of Earthfire Caves, from the most basic to the highest.

In addition, the ground fire here is extremely stable, always maintaining a certain level and temperature.

Of course, if you want to raise the temperature a little bit, or lower it a little bit or something, it's very simple.

These modern thermostats around the fire can help you solve this problem.

With this refining weapon valley, Lin Ze did not lack the knowledge of refining weapons in his hands, so soon, Lin Ze started his first refining weapon.

It is very difficult to refine weapons, this is something that all martial artists know well, and it is also for this reason that there are not many refiners on the Shenzhou Continent, and the status of each refiner is very high.

Even if the strength of the refiner is very low, only the fourth or fifth level of the day after tomorrow, however, many times, the innate martial artist will give him face.

It's just that for other people's extremely difficult refining weapons, now here in Lin Ze, it is really very simple.

Because Lin Ze has a sense of power in his body, especially if he is now in the Plane Seed World, in this, Lin Ze's sense power does not need to consume spiritual power, it is like a natural ability, Lin Ze can be completely open all the time.

The most important thing in refining is to master the heat, as well as the frequency of refining, and the changes in materials, and these are all hidden under Lin Ze's inductive power.

It is also for this reason that for other people's difficult refiners, here in Lin Ze, it is equivalent to one plus one equals two.

Just like calculating a 20-digit multiplication math problem, it takes a long time for the average person to calculate it, and there is no guarantee of accuracy, but with a computer, it is the time to type a few letters, and it can be guaranteed to be 100% correct.

Now Lin Ze is equivalent to a person who has a computer, and other people are like those who don't have a computer and need to type drafts.

There is no comparison between the two at all!

I don't know how long it took, the sound of striking iron suddenly disappeared, and Lin Ze directly sent the sword embryo in his hand into the ice water on the side.

"Boom....." A somewhat shrill voice suddenly sounded, and then a thick white smoke was seen floating from the icy water.

This white smoke was so big that it even enveloped Lin Ze's whole person.

"Haha......"

When the smoke cleared, Lin Ze raised the sword embryo in his hand and looked at the sunlight above his head, and soon, his face was full of satisfied smiles, and laughter also came out of his mouth.

"Very good, this time I finally hit a suitable good sword, hahaha........" Lin Ze kept smiling in his mouth, he was very satisfied with the sword in his hand.

Lin Ze has been refining swords for three days, although Lin Ze has magical induction to help, however, refining weapons is not such a simple thing, not to mention that Lin Ze was the foundation of a little refining before.

Not to mention anything else, the frequency of striking iron alone took Lin Ze two days.

Lin Ze's induction power can help him understand when to put the hammer, but the strength of his hands is still not well controlled, and it is not until two days after a series of contacts that Lin Ze will be able to ensure the output of the power of his hands, and at this moment, Lin Ze's refining weapon can really begin.

However, even if Lin Ze mastered the strength and weakness of the output of strength later, his next refining weapon was also full of failures.

Lin Ze's power to lower the hammer was mastered, but he had not yet mastered the landing point of the lower hammer, so in the next day and a half, Lin Ze directly refined fifty sword embryos of his subordinates, and every time the sword embryo was refined, it was because the lower hammer point was not well mastered.

Fortunately, Lin Ze has the ability to feel in his body, so after a day and a half of practice, Lin Ze has now mastered the hammer point.

No, this new sword embryo was directly refined.

Looking at the sword in his hand that he had worked so hard to refine, the corners of Lin Ze's mouth were full of joy.

However, soon, Lin Ze slowly retracted the smile on his face, he stroked the sword body, and muttered to himself: "I've only refined a sword embryo now, and there's nothing to make a fuss about." ”

Lin Ze slowed down for a moment, and quickly said to himself: "The next thing is to engrave the formation pattern on the sword embryo, only after completing this step, can this sword be regarded as a real refining success." ”

"Fortunately, I have the power of induction, so this engraved formation, which is the most difficult for other refiners, is the easiest thing for me. ”

Thinking of this, the corners of Lin Ze's mouth showed a smile here.

Why are alchemists so rare?

The reason is that it is very difficult to engrave the formation pattern on the refined embryo.

The refiners here don't have modern magnifying glasses, or microscopes or anything, and they don't have Lin Ze's inductive power, so they really rely on their own eyes and their hands that have gone through tens of thousands, or even hundreds of thousands of tests, to engrave the formation patterns on the embryo.

The hardships in the middle are not something that ordinary people can persevere.

Just like the miniature carving in history, before the appearance of magnifying glass, the miniature carving master was extremely rare, and the price of each microcarving was also extremely expensive, because the miniature carving master at that time was really very few, very few, and it can even be said that there is no one in ten thousand.

In modern times, with the help of magnifying glasses, there are more microcarver masters, and the price of microcarving has naturally dropped rapidly.

Lin Ze was now equivalent to a person with a modern magnifying glass in his hand, and the difficulty of engraving the formation was countless times smaller than that of an ordinary refiner.

Coupled with the feeling and control of frequency that Lin Ze had refined when he was refining the sword embryo before, now for him, the difficulty of engraving the formation pattern on the sword embryo no longer exists.

However, having said that, after all, this was Lin Ze's first engraving of the formation pattern on the refining weapon, so Lin Ze still paid two hundred percent attention to this matter.

Lin Ze first exhaled deeply, and then directly took a short needle made of amethyst that had been prepared a long time ago.

Amethyst is a kind of yuan stone, it not only contains sufficient aura, and extremely hard, and the conductivity of true qi is also the best, so amethyst is the best spiritual material for engraved formations.

Picking up the amethyst needle, all the true qi in Lin Ze's body began to run slowly, and then, a trace of true qi was poured into the short needle in a smooth and orderly manner, and soon, half an inch of light flashed on the tip of the needle.

The light on the tip of the needle is uncertain, and it blooms with an incomparably mysterious light.

However, after all, this was Lin Ze's first time engraved the formation pattern, so he was very careful, and in terms of manipulating the true qi, he did not input a large amount of true qi at once, but a very small input.

Therefore, the light on the tip of the needle is constantly puffing, but the light is not large, like the glimmer of light released by a small candle in the night, constantly swaying with the wind, as if it will be extinguished at any time.

Lin Ze didn't pay attention to the changes in the light on the tip of the needle, he was concentrating all his energy at this time, constantly strengthening the impression of the formation pattern in his mind, so that the subsequent formation pattern engraving could be smoother.

At this time, in Lin Ze's eyes, this little ray of light was already his whole world.

"Let's start!" Lin Ze said to himself very calmly in his heart.

"Huh!", Lin Ze's right hand was raised slightly, and then the light between his fingers fell on the long sword that he had refined before.

Lin Ze's movement was very light, and no sound came out in the middle.

The surroundings suddenly became very quiet, but in Lin Ze's heart, he could clearly sense the slightest change and sound caused by the friction between the light and the sword body.

This kind of change is not big, and it will not even affect the quality of the sword body, if you simply use the naked eye to observe, I am afraid it is difficult to find these mutations on the sword body.

This is also the reason why there are so few refiners, the difficulty of engraving the formation pattern is really too great.

If you want to discover the above changes, you can only use modern equipment, or Lin Ze's induction, or the experience accumulated from tens of thousands of exercises.

Walkers have seen a video about the manufacture of high-speed rail rails, when the rails of high-speed rail are closed in pairs, it is necessary to ensure that the error is extremely small, as small as half the size of a hair.

Such an error is not only troublesome and time-consuming to inspect by machine, but also cannot guarantee 100% error-free.

So how did this final puzzle come to be?

Quite simply, it is to rely on the human finger to feel the difference in contact between two rails.

And to do this, you need to touch it countless times to feel the error between the two.

Tens of thousands of times, or even hundreds of thousands, can ensure the accuracy of the error.

The same is true for alchemists, only after countless experiments can they master the engraved formation patterns and finally become a refiner.

However, it is too difficult and too difficult to do this, and many people give up because they can't bear such hardships in the middle of the way.

If it were Lin Ze, if it weren't for the help of the induction force, he wouldn't have become a refiner.

It's not that Lin Ze doesn't have that kind of persistence, but Lin Ze doesn't have the time to be a refiner.

He still has countless displaced people to resettle now, Huangsha Town, Black Sand City, and Wind City are also waiting for him to develop, these things will occupy Lin Ze's time on the seventh layer, and the rest of him will always have to accompany Ping'er and the others around him, as well as cultivation or something, so where does he still have time to be a refiner.

However, Lin Ze has the help of induction, so he doesn't need to go through the process of tens of thousands of experiments, hundreds of thousands of times, he has now preliminarily become a refiner.