In the workshop, Yunfei swung the hammer vigorously. Under his hands, a piece of red-hot metal slowly deformed on the anvil, from a square iron ingot to a flat piece of iron, which was then folded and tightly tempered together. Then, Yunfei heated, extended, folded, and tempered the metal block again, and so on.

This is a tempering technique that Yunfei learned from the workshop, called the Nine Forging Steel Method, which is a technique of repeated folding and forging. It is the same name as the 100 steelmaking method, and it belongs to the method of warm forging.

Weapons made with the nine-forged steel method have a strong body and are full of sharpness, so this nine-forged steel method is most suitable for making sword weapons.

Every nine folds and forges, the weapon's performance is greatly improved. Below the nine stacks of forging, the weapons created are still non-productive. Such a weapon is acceptable as a kitchen knife, but it is not enough to be used in battle.

The nine-forging steel method folds and forges more than nineteen before it can be used as a combat weapon. Among them, there are also 29 products, 49 Dingxuan, 69 broken ground, and 89 Qitian.

If you can forge the number of ninety-nine, then the weapon will be out, and the thunder will be thundered in nine days. Once you have survived the thunderstorm, you can be called a god with this weapon. It can be said that as soon as the artifact comes out, it is difficult for weapons in the world to be the edge.

It's just that the weapons of ninety-nine are mostly a kind of legend, and they can't be true. Because the repeated folding of the material has an upper limit, it is rare to break through the number of eight or nine.

Depending on the material formula, once the number of folds exceeds the upper limit of the material, it will inevitably break when forging. In this case, all the previous folding forgings will be wasted, and the discarded materials will have to be repurposed.

In fact, there are very few weapons that can reach the number of six or nine, let alone those that can reach the number of eight or nine.

If Yun Fei wants to forge a silver weapon, he must first use the Nine Forging Steel Method to create a fixed Xuan weapon embryo with at least four or nine, and then find a way to give the Xuan-level weapon a spirit and upgrade it to a silver weapon.

Ding Ding ...... Ding Ding ......

Under Yunfei's hammer, the embryo gradually deformed.

During the assembly line, because Yunfei was mainly responsible for the first half, he did not have a deep understanding of the method of nine forging folding. Today, when he built independently, he found that the process of building the Nine Forging Steel Method was much more difficult than he imagined.

When folding the 19th stage, it was relatively easy. At this time, the embryo is very soft. With a little heating, the embryo can be easily deformed.

As folding forging continues, the temperature of the furnace must be lowered to keep the embryo at a critical temperature. In this way, the embryo will not be re-fused due to high-temperature tempering, and it has the characteristic sturdiness characteristic of folding.

However, in this way, the forging of the embryo is much more difficult.

After the nine forgings, with the increase of the number of folding layers, the embryo became stronger and stronger. Every time you temper it, you have to use all your strength to refold the iron piece little by little, hammer it out of shape.

After a whole day of tempering, Yun Fei's arms were already sore, and he was covered in sweat, and the embryo could be folded to the number of forty-nine.

Yun Fei looked at the embryo on the anvil, and wanted to superimpose and temper again, but he was a little lacking in mental strength. Even if it is four or nine, it took a lot of effort for him to temper it. If he was to temper it again, he wasn't sure if it would go well next time.

As the temperature of the embryo decreases, the natural overlapping texture marks on the dagger gradually appear. Yun Fei trimmed the embryo slightly, sharpened it, quenched it, and inlaid it with a steel handle, and a black and heavy dagger took shape.

This is just a mysterious dagger, not a silver-level dagger. How to give it spirit is the key to the success of the silver weapon.

Yun Fei took out the Linglong Fruit, turned it around in his hand, and then retracted it into the storage bag.

Karui definitely knows how to empower spirits, but he definitely doesn't want Yunfei to be promoted through support items. Otherwise, he would just direct Yun Fei, and there would be no need to arrange any forging tasks.

Yunfei silently recalled the operations of other blacksmiths during the assembly line.

One of them is dedicated to the process of spiritual empowerment. Yun Fei only remembered that the blacksmith had used a powder to smear the entire body of the embryo, and then hammered it hard, kneading the powder into the weapon itself.

With a flash of inspiration, Yun Fei hurriedly took out the heart of a brave man from his arms and observed it carefully.

On the emerald green necklace, there is only one lustrous green gemstone, which exudes a soft glow. Other than that, there was nothing on the necklace. The one that can provide auxiliary cultivation functions must be this gem.

Yun Fei's eyes lit up.

He hurried out the door and came back with a little gem powder from the other blacksmiths. Yun Fei then heated the dagger slightly, sprinkled it with gem powder all over its body, and then picked up the hammer again.

Bite...... Bite...... Bite......

The color of the black iron gradually dyed green, and when it came to the dagger, the green glow was dyed all over, and a cold sharp aura came to the face.

Yun Fei couldn't help but shudder, and then, he smiled happily again.

It worked, and he was on the right track.

The dagger, which had just been lifeless, seemed to come back to life. The black lines on the knife body gradually faded, and a smart slight light was reflected on the knife surface. Like a light breeze, like autumn water, flashing with sparkling waves.

The small dagger is held in the hand, and there is a sense of lightness and smoothness, and it is no longer the heavy appearance just now.

Yun Fei remembered something, and hurriedly engraved the four small words "Wind Blade" on the handle of the dagger.

Suddenly, a dazzling golden light fell from the sky, enveloping Yun Fei's whole body. This is the light of promotion.

Yun Fei couldn't help but close his eyes, raise his head and fur his eyebrows, bathed in the golden light.

A sense of accomplishment arises spontaneously. Yunfei felt that he had been sublimated, and his whole person became refreshed. Immersed in the golden light, the indescribable relaxation and comfort, as if the fatigue of the whole day was swept away with the arrival of the golden light.

In the workshop, Kalu, who was forging weapons, suddenly paused, turned his head to look in the direction of the golden pillar of light, and a happy smile appeared on his cold face.

After a long time, the golden light faded, revealing Yun Fei's figure again.

Yunfei slowly opened his eyes, ignoring the onlookers around him, and walked towards Karui's location.

Yun Fei respectfully handed the dagger to Kalu: "Master Kalu, I have successfully created a silver weapon, please take a look!"

Karui smiled, "Congratulations on your promotion to Master Craftsman!"

"Master?"

Yunfei looked at Karui in confusion, waiting for Karui to explain to him.

Karui didn't immediately reply. He glanced at the dagger, and instead of taking it, he said, "Put it away." ”

"Yes!" Yun Fei agreed, and took the dagger.

Karui took out a thread-bound book, handed it to Yun Fei and said, "This is the blacksmith's experience I wrote down. It contains some of the forging techniques of high-level blacksmiths, as well as instructions for drawing drawings. You take it back and take a look at it first. Rest for the night tonight, and tomorrow, you draw a pistol drawing as soon as possible and give it to the adventurer. Do not break the covenant of the Lord God. ”

Yun Fei said respectfully: "Yes! Thank you Master Karui for your kindness, Yun Fei is grateful!"