"Clang… clang… clang!"
A deep, resonant bell rang out, its penetrating sound echoing across the entire sky island before spreading toward the seas below…
The Shandians all looked up in shock, their expressions turning excited. "This is… Masaka…!"
"Huh?"
Monkey D. Luffy blinked in confusion when his attack unexpectedly landed. Tilting his head, he was full of question marks, clearly not understanding why Enel had been hit this time.
"Well, whatever! As long as I win, that's all that matters!"
He quickly brushed the thought aside and turned to look at the nearby Nami. "Nami! Are you okay?"
"Huh? …Mm! I'm fine! Actually, I'd say I just got lucky!"
Nami held a strange scroll in her hand. At Luffy's question, she froze for a moment before shaking her head.
Just as Luffy had sent Enel flying, she had seen a scroll and a crystal suddenly fall from midair.
Out of instinct, she reached out to catch them. But the moment she touched the crystal, it melted directly into her body.
At the same time, a piece of information appeared in her mind: the crystal was a Chakra Seed {A condensed form of chakra created by the Exchange Talent}. With it, she could learn the Chakra Refinement Technique, refine chakra, and grow stronger.
"So… this should be the Chakra Refinement Technique, right?"
Nami curiously looked at the scroll in her hand. Upon opening it, she found that it was indeed the Chakra Refinement Technique. Her eyes immediately lit up.
…
Shiro Akira tilted his head. "??? Huh?"
"Why did that mass of chakra turn into a crystal? And it fused directly into Nami's body?"
"And the text on the Chakra Refinement Technique scroll… it seems to have changed!"
Shiro Akira had observed carefully—he was certain the text had changed.
And Nami's final words clearly indicated that she had somehow learned what the Chakra Refinement Technique was.
Shiro Akira guessed it was caused by the mutated chakra crystal.
"Could it be something my Exchange System did?"
He speculated inwardly.
But it didn't quite feel like that was the case.
At that moment, the image in his mind ended. Shiro Akira snapped back to reality and suddenly felt a weight in his right hand. A strange blue fruit with spiral lightning patterns had appeared in his palm.
At the same time, a stream of information surfaced in his mind:
[Rumble-Rumble Fruit] (Your Exchange System found the fruit's weaknesses unacceptable and thoughtfully removed its flaws; it also contains all of Enel's insights and mastery over its development.)
In its original destiny, it would have been wielded by Enel, only to be defeated by the chosen protagonist, Monkey D. Luffy, before eventually accompanying the eccentric Enel to the moon.
…
"Hiss! I've struck it rich!"
Shiro Akira immediately stopped worrying about what had happened on Nami's side. His eyes burned with excitement as he stared at the Rumble-Rumble Fruit in his hand, a grin spreading across his face.
"Crunch! Crunch!"
Without hesitation, he began devouring the fruit in large bites.
"Mm… it actually tastes pretty good?"
Shiro Akira was surprised. He had been fully prepared for something disgusting.
"Looks like removing the flaws improved even the taste… or does bad flavor count as a flaw too?"
He couldn't help but speculate.
Before long, he had finished the entire fruit.
He then closed his eyes and carefully sensed the changes within his body.
"Thump! Thump! Thump!"
Suddenly, his heart pounded heavily three times. Immediately afterward, a strange new power surged through his body.
At the same time, a vast amount of information flooded his mind—
All of it related to the development, abilities, and techniques of the Rumble-Rumble Fruit.
It took Shiro Akira several minutes to fully digest and absorb everything.
Now possessing all of Enel's accumulated experience, Shiro Akira felt completely familiar with the fruit's power.
He immediately stood up and attempted elementalization.
It worked effortlessly.
Watching his hand turn into blue lightning and pass straight through the table, Shiro Akira broke into a delighted smile.
However, he could only maintain the state for ten seconds before being forced to revert.
"Huff… huff…"
His face turned slightly pale as he caught his breath, muttering gloomily, "Damn! This ability consumes way too much stamina! I can't even last ten seconds—seriously?"
He had been so excited about obtaining Enel's full mastery that he had forgotten—he didn't possess Enel's monstrous physique.
"Looks like I'll need to seriously train my body and stamina next."
After recovering some of his strength, Shiro Akira secretly went to a river several kilometers away and tested other techniques.
"100 Million Volts: Thunder Bird!"
"Lightning Dash!"
"Thunder—"
In the end, he came to a conclusion:
Many techniques couldn't be used at all due to insufficient stamina.
Others were significantly weaker for the same reason.
But overall, his strength had increased tremendously thanks to the Rumble-Rumble Fruit.
"I wonder… can chakra be used to replace the stamina consumption?"
On his way back, Shiro Akira pondered this.
If it worked, he would be able to sustain his abilities much longer.
"Speaking of which… I should have gained a Lightning attribute now, right?"
Back at home, the thought suddenly occurred to him.
He had previously tested his chakra nature—it was Water and Earth dual attributes.
He didn't have a Lightning attribute.
That was why he hadn't learned the Lightning Release: Thunder Sphere technique.
As for the two B-Rank jutsu?
They were far beyond what he could currently handle.
"Let's test it. I still have two chakra test papers at home."
With that thought, Shiro Akira took out a piece of test paper from his box and began channeling chakra into it.
In the next moment, half of the paper became wet, while the other half wrinkled—then suddenly, the entire sheet shattered into pieces.