One Piece: Start with Zanpakutō

Whoosh!

Just as everyone was still caught up in the shock of Rosen smashing the giant iceberg and turning it into a beautiful rain of ice shards, Brynndi World's figure suddenly vanished.

He charged at Rosen at a speed more than ten times faster than Rokushiki' Shave.

His speed was so fast that it not only created a sonic boom, but even the Senbonzakura petals floating around Rosen — like loyal guards — failed to react in time.

"Double. Sixty-fold speed."

Brynndi World even had time to glance disdainfully at the cherry blossom blades that tried to intercept him but were too slow. His gaze then turned icy, locking onto Rosen right in front of him. He grinned.

"You're just a Marine brat — no, not even a proper Marine — and you think you can handle me?"

"You should just go back to the academy and start all over again."

These thoughts flashed in his mind.

Brynndi World clenched his fist. His Armament Haki surged, hardening his arm and fist into black iron, and he punched forward like a violent storm breaking through the sound barrier, aiming straight for Rosen's face.

"Multiplier. Seventy-fold punch."

A single move — already infused with hardened Armament Haki — plus the More-More Fruit's seventy-fold speed boost.

Obviously.

This punch was meant to kill.

After breaking the ice, even if Brynndi World's mind was momentarily dazed, he wasn't so far gone as to not see the situation clearly.

One Zephyr. One Borsalino.

Even without having met before, his Observation Haki didn't lie.

Compared to Zephyr — retired, old, and sick — Borsalino's aura was far stronger.

Brynndi World knew clearly: if he wanted to escape Infinite Hell, he had to get past both of them.

The best tactic was to finish it in one strike, taking Rosen out while Zephyr was still using him for training.

"One down."

Looking at Rosen standing there seemingly dazed, unable to react, Brynndi World sneered in his heart.

Three more to go.

"Do you want me to act?"

Borsalino looked at Zephyr — his meaning obvious.

With Brynndi World's speed, he was the only one who could save someone in time.

That was precisely why Sengoku had arranged for Borsalino to accompany them — not only to suppress any runaway prisoners from Level 6 but also to give Rosen space to push forward.

After all, no one in the world could match the speed of the Glint-Glint Fruit.

What surprised Borsalino was that when Rosen was in danger, Zephyr didn't even react.

Just as Borsalino secretly wondered if Zephyr had grown too old to catch his signal, the situation on the battlefield suddenly shifted dramatically.

"Blut Arterie (Active Blood Dress)."

In an instant, Rosen moved.

He first injected Armament Haki into his blood vessels — not to evolve into pure defense, but to transform into pure offensive power. At the same time, he combined it with the other two Armament Haki techniques.

Hardening, to make his arms harder than steel.

Then.

He stepped forward, raised his arms, and without any flashy movements — just a plain, straight punch — he swung at Brynndi World's raging fist.

Boom!

The fists collided, and a deafening roar shook Infinite Hell.

Even though the materials used to build this prison floor were top-grade, under the explosive collision of Haki from the two men, the ground beneath them split open from the shockwaves.

"You caught it!?"

Brynndi World was stunned.

This was a punch hardened with Armament Haki and accelerated seventy times by the More-More Fruit — yet Rosen had caught it head-on with just his Armament Haki.

No matter how hard he pushed, the opponent's fist felt like an immovable mountain.

"Is that all you've got?"

Rosen suddenly raised his head, his cold eyes piercing into Brynndi World's pupils like twin blades.

Boom!

Before Brynndi World could react, the fist that had been colliding with him suddenly exploded with a flood-like force. Even though Brynndi World's fist was fully hardened, Rosen's Haki spread through like liquid, directly invading his arm, destroying muscles, tendons, bones, and rushing straight toward his internal organs.

"Ahhh!"

Brynndi World's face twisted in agony. The excruciating pain in his arm continued to spread throughout his entire body, each instant more torturous than the last.

The Blut Arterie (Active Blood Dress) evolved to ultimate attack mode.

Hardening to maximize arm strength.

Emission to transmit the Haki into the opponent.

Internal destruction to invade and crush from the inside.

In this seemingly simple punch, Rosen had pushed Armament Haki to its absolute peak — all five techniques combined.

Not only had he taken Brynndi World's More-More Fruit-enhanced strike head-on, but he had also completely crushed his defense and left him screaming in agony.

"Double. Fifty-fold Shave."

Blood spewed from Brynndi World's mouth. He immediately used the More-More Fruit to boost his speed fifty times and combined it with the Rokushiki' Shave — something he had mastered through countless battles with Marines.

Though not his maximum, the speed still shattered the sound barrier, allowing him to explode away like a bullet.

But

Before he could fully retreat, Rosen's fist turned into a claw. His five fingers, hardened to pitch-black iron, clamped down on Brynndi World's wrist.

Clang!

Sparks erupted where their hands met, sending fresh waves of pain through Brynndi World's arm — yet he still failed to break free.

With that momentary pause, the cherry blossom blades scattered around Rosen immediately seized the opportunity. They rushed in from every direction like a tidal wave.

Whoosh!

The sharp blades pierced flesh and severed bone.

In an instant, Brynndi World's entire body was riddled with countless wounds, blood and flesh spraying wildly.

Crisscrossing lines of blood-red gashes covered his body, and blood spurted out like a fountain.

"Dammit!"

A hundred meters away, Brynndi World managed to escape and fell to one knee, gasping heavily.

He looked at his hands, legs, and torso — all covered in dense, grotesque wounds.

Each gash was so numerous and fine it sent shivers down his spine.

All of this had been done by Senbonzakura in the blink of an eye.

"I couldn't guard against it."

"Even though I used Armament Haki to defend... I still couldn't block it."

"Just like that punch just now..."

Brynndi World's face turned dark as ink.

When Rosen had grabbed him, he realized something was wrong and quickly hardened his entire body. Yet his skin was still sliced to ribbons by those cherry blossom blades.

Clearly.

He wasn't the only master of Armament Haki here.

Each of those countless Senbonzakura blades didn't carry overwhelming individual power — but there were simply too many of them. Each one was imbued with a hardened Haki.

Had he not used absolute speed to forcefully break out of the encirclement, those blades might have torn him completely to shreds in seconds.

Brynndi World had no doubt.

Just one direct exchange had left him covered in wounds from head to toe.

At this moment.

The World Destroyer looked at Rosen with a completely different expression.

No longer as a mere brat from the Marines.

But as a true, worthy enemy.

...

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