One Piece: The user of the Nen-Nen Fruit, who overturned the sea.

Half a day later,

The outline of Thor's Isle came into view. Even from a great distance,

You can also feel the violent, thunderous power emanating from that island.

Upon landing on the island, Barrett and the others immediately surrounded him.

"Boss! You guys are back so soon?"

Savi exclaimed in surprise.

"Is the bloodline transplant all sorted out?"

"Not that fast."

Roy briefly explained the situation.

"We need to wait three months for the first batch of fused clones to mature. During this time, we will continue our cultivation."

Roy looked around at everyone and noticed that in just half a month, everyone's aura had improved significantly.

"Looks like no one's been slacking off."

Roy nodded in satisfaction.

"Over the next three months, we will undergo more intensive training. Training to increase our resistance to Seastone will also be put on the agenda."

"As ability users, Seastone is our natural nemesis."

However, in future battles, the probability of encountering seawater and seastone weapons will increase, and we must adapt in advance.

Roy asked Tezzolo to retrieve the Seastone bracelet he had brought with him.

"Starting today, everyone will wear the Shanghai Lou Shi bracelet for resistance training."

Roy took a heavy metal box from Tezzolo, opened it to reveal dozens of neatly arranged bracelets inside.

These bracelets are the same size and style, but there are obvious differences in color and luster—some are dark gray with a rough surface; others are dark black with a metallic luster.

"These sea stone bracelets range in purity from 10% to 90%."

Roy picked up a dark gray bracelet.

"The lower the purity, the weaker the suppression effect, which is suitable for initial adaptation."

The higher the purity, the stronger the suppression; you'll gradually adapt.

Roy distributed the bracelets to everyone, and then chose the one with the highest purity to wear on his own wrist.

A sudden feeling of powerlessness washed over him, and Roy stumbled, instantly feeling his mental energy disconnect.

Aside from being able to use Observation Haki, they can no longer materialize their mental energy to unleash their abilities.

The instant Roy put on the Seastone bracelet, the gravity field he had just set up on Thor Island vanished.

This also relieved the bodies of everyone who was used to cultivating under the pressure of gravity.

Sensing something amiss, Jack and the others on the island all moved closer to Roy.

"What's going on? Gravity has disappeared?"

Yamato was the first to rush over.

"What is this...?"

Roy steadied himself and took a deep breath.

The oppressive feeling of the Seastone surged from his wrists to his entire body like a tide, locking his mental energy inside and making it impossible to use his Devil Fruit abilities.

Roy shook the sea stone bracelet on his wrist.

"Seastone resistance training. You've come at the right time, join us."

Roy pointed to the remaining bracelets in the metal box.

"Choose the appropriate purity yourself. From today onwards, you must wear it while training on Thunder Island."

Jack, Rumti, Page Van, and Maria looked at each other in bewilderment.

Having lived in Wano Country for so long, they certainly knew about the effects of Seastone, but training with Seastone bracelets directly... this was truly the first time they had ever heard of it.

"I want to try it!"

Yamato was clearly interested in the new training method, and excitedly stepped forward to randomly take out a bracelet from the box.

Before he could even feel happy, his entire body went limp the moment he grasped a high-purity sea stone bracelet.

"Yamato!" Jack and the other three exclaimed and rushed forward to help the limp Yamato.

Roy strode over and took the sea stone bracelet from Yamato's hand.

That was a high-concentration bracelet with a purity of 80%, and its suppressive effect was too strong for Yamato's current physique.

"No...it's nothing..."

Yamato's face was pale, and cold sweat beaded on his forehead.

"I suddenly felt completely weak all over... It was a terrifying feeling..."

Roy reluctantly picked out a bracelet with lower purity from the box and handed it to Yamato.

I really don't know where Yamato got her carefree personality from. Kaido may seem reckless, but overall he's not a brainless person.

Could it be inherited from Yamato's mother? But the original work doesn't mention who Yamato's mother is.

To be chosen by a powerful figure like Kaido and have a daughter with her, she must be quite an extraordinary woman.

Seeing that Yamato was alright, Jack, Page One, Runty, Maria and the others each picked out some sea stone bracelets that suited them.

Although I also felt powerless, at least I didn't collapse like Yamato did just now.

"It feels... so strange."

Runti flexed her wrists. "The Devil Fruit power seems to have disappeared; I can't activate it at all!"

Paget nodded: "Me too. I can only maintain a basic human form."

Maria put on the 20% purity bracelet; her tall figure swayed slightly, but she quickly regained her balance.

"The suppression effect is indeed noticeable. However... it seems acceptable."

Jack opted for 30% purity, and after putting it on, he let out a muffled groan. His humanoid form shrank from over 10 meters to about 7 meters, and the mammoth features disappeared.

"That's more like it! Captain Roy, how long will this training last?"

"At least three months."

Roy put his seastone bracelet back on. This time, he was mentally prepared. Although his steps were still unsteady, at least he was able to stand firmly.

"Once you can complete your daily training at the current purity level, you can move on to the next stage."

Roy looked around at everyone.

"Now, everyone is ready. Let's begin today's training—complete your daily training quota under the suppression of your respective Seastone bracelets."

"Boss!" Savi wailed.

"Boss, I feel like it's better to train under the pressure of gravity."

"This feeling of weakness all over my body is really uncomfortable."

That's why it's called training.

Roy pretended not to see Savi, Enel, and Pea's pitiful expressions and headed straight for the interior of the island, where lightning was dense.

"Remember, no one is allowed to remove the bracelet without permission. You might thank me someday!"

Left with no other choice, everyone gritted their teeth and began training.

With their Devil Fruit powers gone and their bodies suppressed by Seastone, everyone was essentially relearning how to walk.

Their weak bodies made them move as slowly as snails.

Right now, the most relaxed people on Thunder Island are Hawkeye and Charon. Hawkeye is obsessed with swordsmanship, so he doesn't value Devil Fruits much.

After joining the Roy Pirates, Charon was envious of the amazing abilities of the crew members for a long time.

If Charon, a fish-man, hadn't known that eating a Devil Fruit would make him despised by the sea, he would have loved to immediately pick a Devil Fruit from Roy and eat it.

Seeing his companions struggling to walk because of the Seastone bracelets, Charon's envy suddenly dissipated considerably.

"So being a superhuman is this tough..."

He muttered to himself, his resolve to focus solely on Fishman Karate and the Six Styles of Kata no Shita without relying on external aids.

The first day of training was spent amidst everyone's painful cries.

But Roy astutely observed that although everyone was complaining on the surface, no one was actually slacking off.

Even Pea, who was least skilled in physical combat, gritted her teeth and completed the basic physical training in the sparsely lightning-sparse outer area—albeit at a pace that resembled slow motion.

"very good."

As evening training ended, Roy took off his Seastone bracelet, feeling the exhilarating return of his strength.

Everyone worked very hard on the first day.

Remember this feeling—powerlessness, weakness, and oppression. Three months from now, when you take off the bracelets, you'll understand what these three months of hellish training meant.