The eldest grandson, who was reprimanded by Wu Lao, stepped forward in a daze.

On the other side, the third-year students were naturally unconvinced when they saw the second-year students in front of them, but because of Wu Lao's reasons, they didn't show it.

The eldest grandson glanced at the finished product on the side of the refining furnace, and he had a number in his heart.

"Old Wu is still forging that set of flying swords?" The eldest grandson asked.

Wu Lao nodded, and his mind was all on the flying sword in front of him at this time.

"It took me so long to finally forge this set of flying swords, but now this last kick has not succeeded for a long time." Wu Lao seemed a little anxious, at this time the flying sword was about to be forged successfully, even Wu Lao, who had always been calm, was a little unable to hold his breath at this time.

The eldest grandson looked through the many semi-finished products on the operating table, and said, "Is it stuck on the last sword heart?" ”

Wu Lao sighed and nodded.

The set of flying swords that Wu Lao is forging now is based on the iron of the mother and child, and contains one hundred and eight sword swords and one main sword. This is where the inspiration for the transformation of the Siqin Jinlu Bee comes from.

When one hundred and eight sub-swords are separated, it is like a swarm of swarms coming out of the nest, and multiple sets of sword formations can be formed with each other. At the same time, the sub-sword can also be integrated with the main sword, and the giant sword formed in this way, whether it is powerful or sword-like, is not comparable to ordinary flying swords.

But the complexity of this set of flying swords is far greater than that of the Jinlu Bee who transformed the siqin, and the forging of one hundred and eight sub-swords is a delicate and laborious work.

Secondly, the forging of the main sword is a very challenging work, and Wu Lao's original design is to forge the main sword with the mother iron in the mother iron as the main material. Although the main sword forged in this way has good communication characteristics with the sub-sword, it contains all the shortcomings of the mother iron.

One of the deadliest points is that it is too brittle, and such a main sword is like glass in battle, unable to withstand the slightest bump. In this way, the only role of the main sword is to establish a connection with the sub-sword, and this result is contrary to the original intention of Wu Lao's forging.

Wu Lao took great pains and repeated trials, and finally decided on a plan to forge the mother iron into a sword heart and insert it into the main sword, such a design was like creating a scabbard for the sword heart.

There are also pros and cons to this design, which does solve most of the shortcomings of the main sword forged by the mother iron, but a new problem arises, the "scabbard" protects the sword heart, and at the same time interferes with the connection between the sword heart and the sub-sword.

In order to solve this new problem, Wu Lao tested almost all the materials with the attributes of the soul, and only yesterday determined the selection of Kenshin.

Now that all the sub-swords and the "scabbard" of the sword heart have been forged, it is time for the sword heart.

The eldest grandson glanced at the scratch paper on the operating table with a somewhat messy handwriting, which recorded Wu Lao's experiments for so many days.

When he saw Kenshin's final plan on the scratch paper, the eldest grandson gasped.

The selection of materials and the complexity of the process made the eldest grandson feel a little frightened.

"How's that, do you have faith?" Wu Lao asked.

The eldest grandson did not reply immediately, but looked at all the processes twice, closed his eyes and reviewed them three times in his heart, and after confirming that it was correct, he said, "You can give it a try." ”

Elder Wu was overjoyed when he heard this, and the eldest grandson had helped him many times, so he understood that the eldest grandson's answer meant that he was sure.

"Okay."

After the two of them adjusted their status, they stood in front of the refining furnace and began forging the sword heart.

At this time, there was another person in the market, that is, the original three-year student, although he was unwilling in his heart, but he didn't dare to disturb the two of them at the moment.

"Soul Refining Copper First?" Wu Lao asked.

"I think we should refine the Soul God Yuan Crystal first." The eldest grandson denied.

The third-year student on the side was a little shocked, Wu Lao was actually discussing with a second-year student, and what shocked him even more was that Wu Lao agreed with the eldest grandson's suggestion after thinking for a while.

The skillful operation of the two, the tacit cooperation, and often a brief communication can understand the other party's thoughts, and the refining tool has a trace of flowing beauty in the cooperation of the two.

At this moment, the eldest grandson has no distractions, and in addition to controlling the fire with all his might, he also has to review the properties of all materials in his heart.

This is thanks to the hellish training of the unknown predecessor when the eldest grandson was cultivating in the Stygian Sea.

At that time, the eldest grandson had just come into contact with refining, and Nameless did not teach him any knowledge of refining, but only gave him a large amount of materials for him to forge.

As for what is forged, Nameless doesn't care, his purpose is to familiarize the eldest grandson with all aspects of the material's properties, as well as precise fire control.

Time passed minute by minute, and the third-year students on the side were surprised to find that they had made mistakes many times, and the eldest grandson did not make any mistakes at all.

Finally, at the last moment, Wu Lao wanted to add the most critical material, the mother iron.

At this time, the materials are in a delicate balance, and there are extremely high requirements for the refiner's fire control, and the slightest fluctuation will lead to the loss of previous efforts.

A bead of sweat also appeared on Wu Lao's forehead, and with a slight shake of his right hand, he added the last mother iron to the furnace.

I saw that the eldest grandson separated a trace of flame and wrapped the mother iron, and finally melted the mother iron into a mercury-like liquid, and then it fused.

"You have to be careful to keep the temperature of the two at a similar level, the slightest mistake will lead to failure." Wu Lao couldn't help but remind loudly.

The eldest grandson did not give a response, to be precise, the eldest grandson had already devoted himself to the furnace at this moment, and Wu Lao's words did not enter the eldest grandson's mind.

The eldest grandson carefully controlled the two flames to wrap the material closer, the operation at this time did not have any technology, it was completely precise control, but this was only a test of the level of a refiner.

When the two flames fused into one, the situation that the two feared did not happen.

"It worked! Get in shape! Wu Lao said excitedly.

There was no need for Wu Lao to remind him at all, the eldest grandson had already acted at this time, and he saw that the liquid in the flames slowly stretched and turned into a slender round sword.

"It worked, it finally worked!" Wu Lao held the sword heart in his hand and couldn't suppress the excitement in his heart.

"Old Wu, the sword heart hasn't been endowed with a soul yet." The eldest grandson reminded.

"It's okay, it's a small matter, leave it to me. You've worked hard, rest. Wu Lao's eyes did not leave the sword heart for a moment at this moment.

At this time, the three-year-old was already stunned from the sidelines, and when he saw that the sword heart had been completed, he left the refining workshop in a gloomy manner.

At this time, Wu Lao's mind was still on the sword heart, and he inserted the finished product into the main sword "scabbard" that had been successfully refined before, and fused it perfectly without the slightest mistake.

"Very good, the next thing left is to give the soul, and this set of flying swords is completed. can finally give Lao Li an explanation. ”

Elder Wu breathed a sigh of relief, turned his head and found that the eldest grandson was still waiting on the side.

"Thanks to you, stinky boy. But then again, where have you been running all this time, you have to come early, and my materials won't be wasted. ”

The eldest grandson was dumbfounded.

Seeing that the eldest grandson didn't speak, Wu Lao waved his hand, and then said: "Okay, okay, just make the flying sword, anyway, these materials are counted on Lao Li's head." ”

"By the way, what are you doing here? It's not like he's coming to visit me, an old fellow. Old Wu looked at the eldest grandson playfully.

The eldest grandson didn't blush, and said directly: "The student does have one thing that he wants to trouble you, Old Wu. ”

"Hmph, you know, you stinky boy is famous for not going to the Three Treasures Hall for everything......"

Wu Lao was complaining, only to see the eldest grandson take out the design of the gun casually and hand it to Wu Lao.

Just one glance made Wu Lao stop complaining.

Wu Lao took the drawings and studied them carefully.

After a long time, Wu Lao's eyes still did not leave the drawing, and he said: "Use the spirit stone as the energy source, gather the spirit through the rune array, and accelerate the charging of the special bullet...... How powerful can it be? ”

"The spirit weapon has not yet been forged, but through our theoretical calculations, the power generated is almost equivalent to a medium-strength true qi release from a sorcerer realm martial artist." The eldest grandson explained.

Wu Lao nodded after hearing this, and said "almost".

"You're inspired by the Matrix Cannon?" Wu Lao asked casually.

The eldest grandson nodded, in fact, the real source of inspiration was the gun in his previous life, but this secret can only be known by himself.

"It's very ingenious, and the medium-strength True Qi is released, and it already has a certain level of threat, you are designed for non-martial artists?" Wu Lao then asked.

The eldest grandson nodded, different from Senior Brother Tie Tower. Senior Brother Tie Ta is a refiner, but he is also a powerful martial artist, and he often considers refining weapons more from the perspective of a martial artist; In contrast, Wu Lao is more like a pure refiner, paying more attention to the design of the spiritual weapon itself, and often not considering other aspects.

For example, the transformation of Siqin Jinlu Bee came from Wu Lao, before which Wu Lao did not consider whether forging a tailor-made spiritual weapon for a non-martial artist was a trivial matter, he simply thought that this was a very creative work.

Just like at this time, Wu Lao also recognized the design of the gun.

"The student has forged all the parts, but this soul-giving thing, the student is indeed limited in ability and cannot complete it."

"Oh? It's all forged, take a look. Wu Lao looked up at the eldest grandson.

The eldest grandson poured the parts in the backpack on the operating table, causing Wu Lao to scold for a while.

"You're also a refiner, do you treat spiritual weapons like this!"

The eldest grandson smiled.

Wu Lao took the parts one by one to his hands and looked at them, not to observe, but to check whether the parts were up to standard.

Wu Lao nodded and said, "Yes, it's very accurate, and it's exactly the same size as the drawing." ”

After Wu Lao put down the parts, he continued: "Let's not talk about the design, your material selection plan is very reasonable, and the strength standard of forging is also very high." Eldest grandson, do you have a master behind you? ”

The eldest grandson nodded, Senior Brother Tie Tower can indeed be regarded as a master level in the selection of materials and forging, at least in the current cognition of the eldest grandson, only the nameless predecessor surpasses him in this regard.

Wu Lao didn't ask more, but nodded with some relief, the eldest grandson, as a student of the Qizi Academy, was the most satisfactory student he had seen in recent years.

"These two spiritual weapons of yours are indeed difficult to forge, and you are indeed a lot weaker than you in terms of soul forging. Stay and give me a hand. ”

said that it was a start, but in fact, Wu Lao had a heart of love for talent and gave his eldest grandson the opportunity to learn.