I'm in Bleach, starting with Unlimited Blade Works.

Coincidentally, Erin is the one who possesses the experience of Yoruichi's Shunpo from over two hundred years later.

Yoruichi said that Kuchiki Byakuya must at least be better than Erin before he is qualified to challenge her. I really want to know what kind of expression Yoruichi will have when Kuchiki Byakuya challenges her after his Shunpo surpasses hers.

"Ah."

Kuchiki Byakuya nodded. That was exactly what the cat demon had said after he failed to challenge it last time.

"Alright, in that case, I'll play along with Byakuya."

Byakuya didn't see anything wrong with his uncle Erin saying that their match was just "playing".

Unlike the cat demon, Byakuya Kuchiki's respect for Erin came from the bottom of his heart.

His father, Kuchiki Sojun, was killed by the traitor Hoshino Hibiki six years ago. It was his uncle who killed Hoshino Hibiki and reclaimed the Kuchiki family's honor.

Moreover, as far as Byakuya Kuchiki knows, Kyoga Hoshino is a powerful enemy who defeated the captains of the 9th and 7th Divisions. The fact that such a strong person was defeated by Uncle Erin shows that Uncle Erin is far stronger than an ordinary captain.

"Then I'll go, Uncle!"

A hint of excitement flashed in Kuchiki Byakuya's eyes. He quickly approached Erin with a burst of spiritual pressure and reached out to grab him.

However, when Byakuya Kuchiki's hand touched Erin, he realized that it was just an illusion.

The real Uncle Erin had appeared behind him and placed his hand on his shoulder.

Byakuya was startled and quickly used Shunpo to dodge.

For a time, the entire backyard was filled with Erin and Byakuya.

However, no matter how Byakuya dodged, Erin would always appear behind him and place his hand on Byakuya's shoulder.

As for Byakuya Kuchiki, from the very beginning, he never saw Erin's figure.

This made Byakuya Kuchiki realize that his uncle's Shunpo was actually stronger than that of the cat demon.

"Byakuya, your Shunpo has gone the wrong way."

After pressing down on Byakuya's shoulder again, Erin tightened his grip slightly, interrupting Byakuya's Shunpo and pinning him to the spot.

During this practice session with Byakuya, Erin could sense that Byakuya's Shunpo technique was too rigid.

"Byakuya, according to your understanding, what is the primary purpose of the Shinigami's Shunpo?"

Byakuya paused for a moment, then replied, "Huh? Isn't Shunpo just for increasing your speed so you can get closer to the enemy faster?"

"really."

Upon hearing Byakuya Kuchiki's answer, Erin shook his head.

No wonder Byakuya's Shunpo is always straightforward, aimed at increasing speed, without any variation, making it easy for others to see through.

"If the only function of Shunpo is this, then Byakuya, do you think Shunpo can be considered one of the Four Great Techniques of Shinigami, along with Hakuda, Slash Technique, and Kido?"

Kuchiki Byakuya was taken aback. The four techniques of the Shinigami, are they very strong?

In Byakuya's view, a Shinigami's strength is closely related to the power of their Zanpakuto.

Having a powerful Zanpakuto can greatly enhance a Shinigami's strength.

Look at the requirements for the captains of the Gotei 13; they all require that the captain must be able to fully realize the Bankai of his Zanpakuto in order to take on the role.

Many battles between Shinigami can only be decided after their Zanpakuto are unleashed.

Seeing Byakuya's reaction, Erin shook his head and turned to Kuchiki Ginrin, saying, "Father-in-law, I'm taking Byakuya out for a bit. I'd also like to ask you to keep an eye on the Sixth Division today."

"Okay, you guys go ahead. I'll keep an eye on the Sixth Division."

Rotten Wood Silver Bell nodded.

In the past, when Byakuya practiced alone, he didn't notice it, but today's match with Erin really exposed many problems.

Kuchiki Ginryu felt she had a great responsibility to bear in this regard.

Because of her advanced age and declining physical strength, Kuchiki Ginrin's teaching of Kuchiki Byakuya was more of a verbal instruction.

Furthermore, Kuchiki Ginrin felt that her days were numbered and believed that the way to help Byakuya improve his strength faster was to unleash his Zanpakuto, which led Byakuya to have the idea that "Zanpakuto is the strongest."

Fortunately, besides himself, the Kuchiki family now has an even stronger member, Erin.

Otherwise, Kuchiki Ginrin would never have known that, under her influence, Byakuya might have been dragged down and gone astray.

……

"call out……"

Erin, carrying Kuchiki Byakuya, transformed into a blur and flew towards Rukongai.

The speed was so fast that Byakuya couldn't see anything around him, and the wind pressure made his hair blown like a broom to the right.

Soon, Erin led Byakuya through the White Gate, left Seireitei, and entered Rukongai.

The four gates of Seireitei only prevent the rūsōnin from entering Seireitei, not the shinigami from entering or leaving Rukongai.

However, because many Shinigami born in Rukongai did not end up joining the Gotei 13, but were instead sent to Hueco Mundo as cannon fodder, the residents of Rukongai felt that the Shinigami in Seireitei had little affection for them.

After entering Rukongai, Erin's speed suddenly increased again.

If Byakuya, being carried by Erin in Seireitei, only had a blurry view of the fifteen people around him, then now, everything in Byakuya's field of vision seems to be stretched out, and he can't see anything clearly at all.

A minute later, Erin stopped in an empty open space and put Kuchiki Byakuya down.

"vomit……"

The unprecedented high speed and sudden stillness left Byakuya Kuchiki feeling dizzy, and he gagged a few times before slowly recovering.

"here it is?"

Looking at the desolate hills around him, Byakuya Kuchiki was somewhat puzzled.

He had never left Seireitei since birth, and this was the first time Kuchiki Byakuya had ever seen such a desolate and lifeless place.

"This is Rukongai, probably in the 78th ward."

"The farther the Rukongai is from the Seireitei, the harsher the environment, and the later the number."

"There is no life within a ten-mile radius here, so it's a good time to test our skills."

"Test your skills?"

Kuchiki Byakuya looked up at Erin.

He certainly knew what it meant to "test his skills".

But is it really necessary to come here?

"Byakuya, do you think the Shinigami fought thousands of years ago, before they even had Zanpakuto?"

"Why is it that over all these years, only the 'Instantaneous Demon Slayer' has been called one of the Four Death God Techniques?"

Chapter 57 The Four Skills of Death

"Byakuya, now you'll experience firsthand just how powerful these four Shinigami techniques that you've been ignoring really are!"

Then, amidst Byakuya Kuchiki's bewildered expression, Erin drew his Zanpakuto from his waist.

"Watch closely, Byakuya, this is a cutting technique!"

After reminding Kuchiki Byakuya, Erin raised the sword in his hand and swung it down suddenly.

"Shh-"

A slash a hundred meters high flew out at a speed that even Byakuya Kuchiki couldn't catch, cutting across several hills.

The next moment, to Byakuya Kuchiki's horrified gaze, the upper half of these hills slid off at an angle and fell to the ground with a loud thud, kicking up a high cloud of dust.

Despite the great distance, Byakuya Kuchiki could still see that the cross-sections of these hills were as smooth as a mirror.

"I don't know what other people's cutting techniques are like—"

This is a lie.

"But for me, the so-called art of slashing is when my sword is swung down, nothing in front of me is cut down, everything is slashed!"

This is the truth.

The Zanpakuto, Kengetsu, of the 10th Division Captain Shiba Isshin, was created while Erin and Hoshino Kyouka were imprisoned in the 9th Division's jail.

Based on the principle of the "Crescent Moon Sky Slash" from One Piece, Erin created a weapon from the pirate world—

The word "Wado"!

This is the weapon of Shimotsuki Koshiro, a reclusive master swordsman in the world of One Piece.

Through this weapon, Erin mastered two sword techniques that were completely different from those of the Grim Reaper: "Iron Cutting" and "Aerial Slash."

That sword strike just now was an aerial slash executed by Erin using his own swordsmanship skills, without the use of spiritual pressure.

Kuchiki Byakuya's eyes widened, his jaw nearly dropping.

Pointing to the hills that had been cut in half, he stammered to Erin, "This, this is the Severing Technique?"

"Yes, it's a cutting technique."

"However, this is my slashing technique."

Sheathing his Zanpakuto, Erin beckoned to Byakuya: "Next, you attack me, and I'll show you my Hakuda style."

"it is good!"

After saying that, Byakuya Kuchiki drew his Zanpakuto and attacked Erin with a series of swift movements.

However, no matter how Kuchiki Byakuya attacked, Erin's body was like a piece of fluff drifting in the wind, narrowly avoiding Kuchiki Byakuya's sword.

"This is paper drawing. Feel the rhythm of the wind, let your body dance with the wind as the enemy attacks, and dodge the enemy's attacks."

Suddenly, Erin, who had been dodging, stopped. Kuchiki Byakuya, caught completely off guard, was unable to retract his sword, which he had swung with all his might. He could only watch in horror as his sword struck Erin's uncle.

"Uncle!"

"clang!"

Just as Kuchiki Byakuya cried out in surprise, he felt as if the sword in his hand had struck steel. Not only did it not cause any harm to his uncle Erin, but it also made his palm numb.

"This this……"

Kuchiki Byakuya was stunned.