I am brushing up materials in One Piece

The room that Koushiro asked Zoro and Kos to clean up was actually a long-abandoned knife forging workshop. After cleaning up the debris accumulated outside the room, Kos opened the door.

What greeted him was the stale gray that rushed towards the door due to the sudden air circulation.

"cough cough"

Kos instinctively turned away from the door, fanning his right hand vigorously in front of him to blow away the dust that poured into his nose.

"Tsk~"

Zoro couldn't help but start speechless after seeing the terrible condition in the room.

Thick dust has accumulated on the anvils and furnaces inside, and various utensils and some wooden boards are scattered messily on the floor. It is definitely not an easy task to clean up.

However, Kos and Sauron still covered their mouths and noses with cloth after ventilating for a while and entered the workshop to start tidying up.

The two of them continued to be busy like this until the end of the moon, and until the two of them collapsed in the clean knife forging workshop due to hunger and fatigue, Koushiro did not come to ask the two of them to eat.

Kos and Zoro first went to the kitchen and dining room, but saw neither prepared meals nor Koushiro.

Sauron thought for a while and then walked firmly in one direction. After thinking for a while, Kos decided to follow.

Fortunately, no matter how crazy a person is, he will not be confused at home, so Zoro took Kos to a room. After opening the door, there was Koushiro reading a book with a light on.

"You're doing this again!"

Zoro lost his temper very skillfully.

After coming back to his senses, Koushiro gently closed the book in his hand, looked at the hungry two people at the door guiltily and said, "I'm sorry, I'm sorry, I accidentally got fascinated by it."

Kos glanced at the books scattered on the desk in front of Koushiro, and found that the books centered on Koshiro were, in order, books about strange stories, sword stories, and blacksmithing techniques.

It seems that Koushiro originally planned to read some related books while the two were cleaning the knife forging workshop to review the knife forging in the future, but unknowingly, he began to gradually deviate from the original purpose.

"Okay, let's go out to eat today after a long time!"

Koushiro stood up and stretched, preparing to make up for his mistakes with practical actions.

"I want to drink beer!"

Zoro also took the opportunity to make his request.

"Snapped"

Koushiro patted Zoro on the head, but did not directly reject his request.

"You are really a big kid, but you can only drink a little bit."

"Great!"

Zoro jumped for joy.

Koushiro looked at Kos again, "What about you? What do you want to eat?"

"I don't care, but let me tell you first that I don't drink."

Kos responded with a shrug.

"Hey! It's really disappointing."

Sauron looked at Kos with a bit more contempt, as if Kos, who didn't drink, was already inherently inferior.

Koushiro didn't say much. He tidied up a little and took the two of them out of the dojo to go out for dinner.

The next day, because Koushiro gave the children a few days off yesterday, the dojo was deserted after breakfast today.

Koushiro took his two disciples to the knife-forging workshop that was just cleaned up yesterday.

Kos and Zoro were responsible for stoking the fire and blowing the bellows, while Koushiro put the strange knife on the anvil and hammered it.

At first, Kos didn't feel anything was wrong. It wasn't until he glanced at the furnace in front of him that it wasn't burning vigorously that he realized what the problem was.

——The sword didn't even pass through the fire, Koushiro was just knocking!

Perhaps noticing Kos's gaze, Koushiro explained while tapping the strange sword: "The structure of this sword is really weird, and it should have had several owners. The inside and outside have been shaped, so it must be Only after it is completely destroyed can a new sword be forged.”

As he spoke, Koushiro's tapping movements became more rapid, and at the same time, Kos seemed to see many invisible lines extending from the small hammer in Koushiro's hand and falling into the strange knife on the anvil.

"Snapped-"

A crisp and slight sound, like a small piece of glass being broken by a hard shoe sole, came from the anvil.

Koushiro pointed to the shelf on one wall of the workshop with his hand holding the hammer and said to Cos: "Cos, go get the box on the shelf over there."

Following the direction pointed by Koushiro, Kos quickly found a heavy square box of unknown material.

"Put it on the ground"

Koushiro pointed to his feet and asked Kos to put the box there.

After Kos placed the box as instructed, Koushiro gently picked up the strange knife placed on the anvil, put its flat "tip" into the box, and then flicked the knife body with his index finger.

"crash"

The blade, which was still intact a moment ago, instantly shattered into pieces of iron no bigger than the nail cap of a little finger, and all of them fell into the box that Kos brought.

Afterwards, the box containing the broken iron pieces was sent into the furnace for calcination. After all the broken iron pieces were melted into a whole, Koshiro took the box out of the furnace, cooled it slightly, and poured out the iron inside for forging.

After a certain amount of shaping, Koshiro sent the iron block into the furnace for heating. After heating to a certain level, he took it out and hammered it into shape.

After repeating this for countless times, a long straight-edged knife with a blade over one meter long gradually revealed its shape during the beating.

After quenching and polishing, a day has passed, and the assembly of the tool handle can only wait until tomorrow.

At Koushiro's signal, Kos wrapped the long knife without a handle in a rag and tried swinging it a few times, but found that it was not as difficult as he imagined.

He seemed to have a feeling that when he swung a knife, the knife itself was also exerting force with him.

"its not bad, right."

Koushiro looked at Kos quite proudly and said,

"Maybe this knife isn't as fast as Wado Ichimonji, but I'm sure this is the knife that's most suitable for you. I took your power-generating habits into consideration when I shaped it. Is it okay to use it? Is there a lightness that doesn’t match the appearance?”

"really."

While nodding in agreement, Kos waved the long knife in his hand a few more times. This feeling really fascinated him, as comfortable as wearing brand new underwear on the first day of the new year.

"Speaking of which, all that's left is the assembly of the handle. It's time to give it a name. Since it's given to you, you can pick it up yourself."

Koushiro looked at Kos with a smile.

After hearing this, Kos looked at the long sword in his hand, which had a thick and straight blade and was three minutes longer than an ordinary sword, and began to think.

To be honest, he was not good at naming. Shang Fang's name before was just taken from a comedy movie, so this time he immediately thought about whether there were any similar weapons in his memory.

"Just call it 'Bie Yun'."

Kos said with a smile.

"'Bie Yun' sounds quite poetic and is a good name."

Koushiro smiled and nodded. It seemed that he was very satisfied with his work and gave it such a name.

Of course, Kos will not tell Koushiro that the name "Bie Yun" comes from a game called "Uri Oni Swordsman and the Lost City", in which there is a sword that looks like a tachi but is too long and too thick. A straight-edged long sword classified as a giant sword due to its blade. The name of that sword is "Bie Yun Sword - Useless". What Cosi is interested in is actually the word "useless" in the suffix, hoping that he can live a leisurely life and have little chance to use it.