Devil's Descendant? A Conqueror's Haki Experience Pack Delivered to His Door

"Conqueror's Haki?"

Rosen showed no surprise at the roaring Conqueror's Haki rushing toward him.

This was Impel Down, a place built to imprison monsters. It was only natural for pirates with Conqueror's Haki to appear here.

"Then let's give it a try!"

King against king.

Whenever kings met, they always started by clashing Conqueror's Haki.

It was the greeting between rulers, their way of saying hello.

If you could take it, then they could keep talking.

If you could not, there was no need to talk.

With that thought, Rosen did not yield in the slightest. He poured his will into his Conqueror's Haki, turning it into a heaven-splitting blade surrounded by immense pressure as it slashed furiously at Douglas Bullet's Conqueror's Haki.

The instant the two bursts of Conqueror's Haki collided, everyone in Infinite Hell heard a thunderous boom explode beside their ears.

Then...

The previously invisible Conqueror's Haki transformed upon collision into two massive torrents, one gold and one purple, erupting into a violent clash.

From afar...

It looked like two incomparably terrifying giant dragons engaged in a desperate battle.

Every collision of Conqueror's Haki unleashed shockwaves like mountain floods and tsunamis.

Every clash of Conqueror's Haki stirred up streaks of black-red lightning.

Everyone in the prison felt as though two enormous mountains had suddenly descended upon their wills, crushing down on them with indescribable oppression and unbearable discomfort.

And this conflict continued.

As time passed, no one in Infinite Hell—no, in Impel Down—noticed that the sea of clouds above the First Layer had begun to twist and rotate like a vortex.

The Conqueror's Haki unleashed by the two men in the Sixth Layer of the undersea prison pierced through the barriers of rock and sea amid their intense clash, spreading skyward like an ascending current and affecting the weather, dragging forth swirling clouds.

"Has he been suppressed?"

"That's perfectly normal!"

"That's the spirit of the Devil's Descendant! Even after being imprisoned for so many years, even if he's no longer at his Peak Period, it can only be described as terrifying."

"How could a wet-behind-the-ears Marine brat surpass that monster in spirit?"

"Still, that kid is impressive. He actually held on."

The prisoners of the Sixth Layer thought it was a one-sided clash. They had not expected Rosen's Conqueror's Haki to be suppressed after the two forces collided, yet not collapse. Instead, it stood firm like a boulder, directly facing Douglas Bullet's overwhelming spirit.

"As expected."

"Technique is technique. Strength is strength."

"Even after being locked in Impel Down for so many years and no longer being at his Peak Period, Bullet was still Bullet."

Rosen was not surprised in the slightest when he fell into a disadvantage in the Conqueror's Haki clash, Nor Did He feel upset or ashamed.

Douglas Bullet had been on the battlefield since childhood. After destroying his own country, he had joined the Roger Pirates and fought the monsters of the Roger Pirates day in and day out.

Even though Garp and Sengoku later gave him a brutal beating with a Buster Call and threw him into Impel Down to await death, he was still not someone Rosen could surpass at this stage.

In the end...

From the moment Rosen first came into contact with Haki until now...

At most, he had trained in Haki for only three days.

And Douglas Bullet?

More than ten years.

"So this is his spirit?"

Through the clash of Conqueror's Haki, Douglas Bullet sensed Rosen's spirit and had roughly judged the other's level.

Frankly speaking, he was somewhat disappointed.

Conqueror's Haki at this level had only just crossed the threshold of mastering Conqueror's Haki Coating. It was impossible for it to bring him any surprise.

However...

Just as Douglas Bullet was preparing to end this Conqueror's Haki clash, his expression changed abruptly, revealing utter disbelief.

Not just him.

Other than Zefa, everyone on the entire prison level stared at Rosen in disbelief.

Or rather, at his Conqueror's Haki.

From being absolutely suppressed at first, it gradually began to rise, like a giant who had split heaven and earth apart, pushing Douglas Bullet's Conqueror's Haki back bit by bit.

"How is that possible?"

Shiryu's eyes widened as he cried out inwardly.

"Junior."

"His presence is getting stronger. No, it would be more accurate to say it's growing."

"But this rate of growth is a little too ridiculously fast."

Borsalino turned to look at Rosen beside him, astonishment written across his face.

Although he did not possess Conqueror's Haki, he knew a great deal about it.

For instance, why did those kings who possessed Conqueror's Haki like to unleash it first whenever they met other kings?

It was both intimidation and a greeting, as well as a way to strengthen their presence.

Clashes of Conqueror's Haki, whether through coating or direct outward collisions, were like forging steel.

Only after countless temperings—after erupting into fierce clashes again and again with other kings possessing Conqueror's Haki—could one raise their Conqueror's Haki to a higher level, provided their will remained firm and their presence unyielding.

But such improvement could absolutely not be achieved through one or two clashes of Conqueror's Haki.

Even if there was improvement, it would not be as outrageous as Rosen's current growth. The rate at which his Conqueror's Haki was improving could only be described as soaring by leaps and bounds.

That was right.

Soaring by leaps and bounds.

Under Douglas Bullet's Conqueror's Haki suppression, Rosen's Conqueror's Haki rose like a dragon lifting its head, continuously growing stronger in an utterly unreasonable manner.

"I knew this would happen."

Zefa crossed his arms. Not only was there no surprise on his face, but he wore an unsurprised smile.

He had already noticed something after witnessing Rosen's battle against Tokikake and Gion yesterday.

Every time Rosen used Haki, whether Observation Haki, Armament Haki, or Conqueror's Haki, it improved visibly.

That improvement would continuously increase along with the strength of his opponents and the pressure exerted by the outside world.

Against Gion and Tokikake working together, Rosen had won with overwhelming strength, and all Three Colors of Haki had improved by a substantial margin. Needless to say, a clash of Conqueror's Haki with a monster like Douglas Bullet, who stood at the pinnacle of the seas, would bring even greater gains.

As long as Rosen could hold his ground and avoid being crushed by Douglas Bullet's Conqueror's Haki, the improvement would be immediate.

That was also why Zefa had insisted on bringing Rosen to Impel Down.

To other Marines, Infinite Hell truly was hell. But to Rosen, Infinite Hell was a treasure trove for grinding experience.

"As long as he can't crush him in one go, Rosen's Haki will undergo explosive growth."

Zefa watched as Rosen's Conqueror's Haki continued to rise, the amusement in his eyes growing deeper.

"He's using my Conqueror's Haki to train."

Douglas Bullet realized it as well.

Back when he had been with the Roger Pirates, he had done this sort of thing plenty of times.

The reason he had possessed strength comparable to Rayleigh's before even reaching twenty was because he had spent every day seeking out Roger, Rayleigh, Jabba, and other kings to grind experience.

What Douglas Bullet had not expected was that one day, someone would use him to grind experience. Moreover, the improvement Rosen gained from a single clash of Conqueror's Haki with him even surpassed the gains Douglas Bullet had received from fighting Rayleigh continuously for several months.

"Hmph!"

With a dark expression, Douglas Bullet directly withdrew his Conqueror's Haki.

Grinding experience was only satisfying when one used others for it. Being used by someone else as an experience farm was not satisfying in the slightest.

Especially at Rosen's rate of growth—after another two or three minutes of clashes, the strength of his Conqueror's Haki would likely catch up to, or even surpass, Douglas Bullet's.

Although Douglas Bullet found it unbelievable, he did not doubt it in the slightest.

"Why did you stop?"

Seeing Douglas Bullet withdraw his Conqueror's Haki and forcibly end the clash, Rosen looked reluctant to see it end.

He checked the information that surfaced in his mind.

Your comprehension defies the heavens. Through a clash of Conqueror's Haki with Douglas Bullet, combined with the cultivation of Qi Body Origin Flow, your kingly presence has undergone a breakthrough increase.

Conqueror's Haki strength increased by 230%.

A single clash of Conqueror's Haki had more than tripled its strength.

What Devil's Descendant?

He was clearly a Conqueror's Haki experience pack delivered right to his doorstep.