One Piece: Start as a mythical beast, practice to become stronger.

In that dim prison cell, a shadow shrouded the pirates.

They were dejected, weighed down by invisible shackles.

However, among these men stripped of their freedom, Barrett's presence was like a flash of lightning cutting through the night, shocking everyone who looked him in the eye.

The pirates whispered amongst themselves, their eyes filled with doubt and bewilderment.

Even their hearts were filled with an awe they couldn't hide.

"How could someone so strong be captured and brought here?"

This became the pirates' shared question.

Such powerful spirit had long surpassed the pirates' imaginations.

In their eyes, Barrett was already among the small group standing at the pinnacle of this world.

The mere pressure of his aura was enough to make most of the pirates on the sixth level unable to straighten their backs.

Every step this man took, every glance he gave, even every wisp of aura emanating from him, revealed a power that transcended the world.

"I would gladly serve him, attending to his horse and saddle."

"Now that he's been locked up, he'll probably be imprisoned for life."

"With this kind of strength, there's no way the Marines will let him see the light of day again."

"Who knows? A prison is just a place to escape from."

In their minds, a man of Barrett's strength would perhaps only need to wait a while before breaking through this mortal cage and returning to the heights where he belonged.

Such a figure, even without saying a word or doing a thing, had already planted an indelible impression in the hearts of every witness.

Barrett's figure, under the dim light, became increasingly mysterious and profound, bringing immense pressure to this prison cell filled with despair and darkness.

......

In a dark corner of the prison.

Two powerful auras confronted each other, like the hilts of two sharp swords colliding in the air, sparking fire.

Jin An stood opposite Barrett, the distance between them very short.

The air between them was compressed by their auras and constantly expanded outwards.

Jin An's gaze lightly swept over Barrett, the pressure he exerted was much less than during their previous battle.

It couldn't even suppress him anymore.

"You don't think I'm still the same as when I fought you before, do you?"

His voice was calm and powerful, and it was still constantly moving in Barrett's direction.

Then, Jin An slowly raised his hand to his eyes, the movement slow but full of strength, his palm gently clenched, savoring the satisfaction of power filling his body.

"I can fight you evenly now."

"During this time, I've been training my body non-stop."

"Compensating as much as possible for the shortcomings exposed during my fight with you."

During the long journey of escorting Barrett to Impel Down.

He cultivated every moment, challenged himself, and honed his will and strength in pain and struggle.

Every drop of sweat, every muscle tremor, witnessed the leap in his power.

Barrett silently watched Jin An, a trace of surprise flashed in his eyes, which was then replaced by an imperceptible smile.

"Your spirit has indeed become much stronger."

"You are an opponent worthy of my serious attention."

"However, your control over Conqueror's Haki still lacks some refinement."

In this world full of dangers, encountering such a challenging opponent might not be entirely a bad thing for him.

He unleashed his aura without reservation.

The entire Impel Down was affected.

Even the Sea Kings swimming around Impel Down were affected by this aura and fainted.

The Conqueror's Haki of a strong man is terrifying.

However, the next second.

A strong fighting spirit flashed in Jin An's eyes.

The prison walls rang with slight vibrations, as if sensing a fluctuation of power in the confrontation between the two.

Barrett's eyes suddenly flashed, illuminating his dark pupils and revealing the surprise in his heart.

"How is it possible..."

His voice was low and hoarse, like a moan struggling from the abyss, the emotion of disbelief condensed in every word.

He was unwilling to believe it, his awkward facial expression like a sail in the waves, erratic and uncertain.

"Only such a short time has passed,"

"How has your strength improved so much..."

Barrett's voice gradually increased, filled with suspicion and confusion.

Barrett's words were filled with disbelief, his eyes fixed on Jin An.

His body involuntarily leaned forward, the movement revealing the turmoil in his heart.

He once thought he could easily see through everything, but now he was defeated by the facts before his eyes.

His originally confident posture began to waver.

His body uncontrollably took a step back, as if he had been hit hard.

A faint trace of fear quietly grew in the depths of his calm, sea-like eyes.

"Roger and the others all said I was a monster."

"I've always been proud of that."

He was unwilling to admit it, but he couldn't deny it.

Jin An was no longer the insignificant character he could easily ignore.

His progress was like a warning bell, ringing long and deep in Barrett's heart.

"I didn't expect there to be someone like you in this world."

"I admit, now, you are stronger."

......

The morning light shone, and a few golden rays of sunlight penetrated the gaps in the heavy prison walls, barely illuminating the dark corridor.

Jin An's figure was firm, his steps echoed steadily on the stone floor.

Toki Kozuki followed beside him.

The two walked together, bringing a glimmer of life to the otherwise silent prison corridor.

Barrett, under the supervision of the guards, was still placed in the designated location.

The long corridor seemed to witness his failure, his once domineering eyes were now dim, all the arrogance and struggle were futile in the face of true strength.

Jin An stopped and turned to Magellan, the man who maintained order in the prison.

His face wore a sense of ease and pleasure from completing the task.

"I'll leave these people to you."

He explained concisely, the subsequent arrangements were no longer their concern.

Magellan nodded slightly, he returned to his usual calm.

"We'll go back to the entrance first."

With nothing to worry about, Jin An relaxed after completing the task.

Crossing the long corridor, the figures of Jin An and Toki Kozuki were stretched, until they disappeared outside the gate of the sixth level.

"What a monster..."

The clash of auras between Jin An and the other, although not directed at him.

However, the aftermath of the collision made him feel nervous.

Wanting to succumb to the two kings of the sea.

He looked at the great pirates imprisoned on the sixth level.

One by one, they were gasping for breath because they couldn't withstand the pressure.

Their eyes remained terrified.

Some of them had also awakened Conqueror's Haki.

However, their Haki could not resist the confrontation between those two people.

This Marine's Conqueror's Haki.

Completely crushed these kings of the old era.

...