Are you really my biological father?

During this time, Arceus had been staying in the underground treasure vault of Onigashima. After greeting Rotom, he left the vault once more. However, as soon as he emerged, he sensed some vibrations.

"What the heck is Kaido up to now?"

According to Wano Country's historical records, earthquakes were rare here, and this particular tremor clearly came from above. Other than Kaido, no one could cause such a disturbance.

When he arrived on the roof of Onigashima, he witnessed Kaido's unique training. In fact, it was no different from before – he was stylishly beating up Yamato. However, Yamato seemed to have seen her savior.

"Dad! Are you finally done with your business?"

During Kaido's training, no one would dare to come here. Jack and Maria, who were already lying lifelessly on the ground, are proof of that. They don't have Yamato's endurance.

However, Arceus' appearance momentarily distracted Yamato, and Kaido had no intention of stopping due to this, so Yamato also proudly joined the ranks of the fallen.

"Done already? It seems her training class is about to come to an end."

For some reason, Yamato, who had endured for two months, suddenly felt like crying upon hearing this. She could only say that these past months had been incredibly tough for her.

"Dad, what have you been doing? Two whole months, do you know how hard it was for me during this time?"

"Two months? I've been busy for that long?"

"Of course! You've certainly taken quite a bit of time this time."

Temporarily concluding Yamato's training, Kaido fastened Hassaikai around his waist and approached Yamato. In the past, Yamato had to be wary of Kaido launching a sudden attack on her, but now, with Arceus reappearing, she finally felt at ease.

"It really did take a great deal of effort, but it doesn't matter now. Yamato, this is for you."

Saying this, he handed Okuchi no Makami to Yamato. However, Kaido felt something was off. If he remembered correctly, this Devil Fruit seemed to be one he had found.

"Is this a Devil Fruit? I don't want to eat it, Dad. I don't want to become unable to swim."

Devil Fruits are not difficult to identify; their unique patterns and markings are one-of-a-kind on the seas, and with a little study, one could gain some understanding of them.

Yamato has her own dreams of going to sea, and she didn't want to give up on her ability to swim for the so-called ability. Maria, on the other hand, is naturally inept at swimming; her whole family lacks any swimming talent, so she didn't care about this matter at all.

But Yamato still attached great importance to it.

"Don't worry. What do you think I've been doing all this time? This fruit won't take away your ability to swim. Just eat it without worries. But as for the taste... I have no idea what it's like."

The intricate project consumed a lot of his energy, so he didn't pay any attention to matters like taste.

"Hey, hey, are you joking? You actually solved that problem?"

Upon hearing Arceus' words, even Kaido was in disbelief. The birth of Devil Fruits happened in a time so remote that no one knows for sure where the very first Devil Fruit appeared.

However, the weaknesses of Devil Fruits were widely known. It wasn't that no one had tried to solve this problem, but no one had succeeded. Yet, in just two months, Arceus had solved a century-old problem.

"Of course not. I've found the method, but there's no possibility of replication. For now, I don't want to do it again."

Removing the drawbacks of the fruit is one thing, but eliminating the drawbacks from a Devil Fruit user is another issue altogether. That project would undoubtedly be more complex, and he had no intention of doing it again before Spooky and Mind Plate are found.

"Worororo, you never cease to amaze. Alright, Yamato, don't waste your Dad's kindness. Quickly go ahead and eat it."

Saying that he took the Okuchi no Makami fruit from her and forcefully stuffing it into her mouth.

"Mmm, cough, cough. Father! Are you trying to choke me?"

"How could that be? Besides, this way, you won't notice the taste of the fruit. Isn't that a good thing?"

"Seems... you're right?"

Due to Kaido's words, Yamato suddenly realized that she hadn't paid any attention to what the fruit actually tasted like. Considering Maria's earlier description of the fruit's taste, this seemed like a good thing.

However, as expected, Kaido wouldn't do something like this for no reason. In fact, his next words exposed his "sinister intentions."

"Yamato, do you know the biggest advantage of Zoan-types?"

"A beast-like physique?"

"Close, but more importantly, it's their incredible recovery ability. Any devil fruit touched by your Dad will only become stronger. The recovery ability brought by this Mythical Zoan is definitely extremely terrifying, which also means that you can now take more beatings."

Saying this, Kaido flexed his muscles, emitting a series of cracking sounds.

"Come on, let me help you train your devil fruit's power in actual combat. Now use that power, and show me the power of a Mythical Zoan!"

This time, Kaido isn't going to use kanabo or Haki. Instead, to Yamato's incredulous gaze, he transformed into a dragon-human form.

"Father, you can't be serious?!"

"Worororo, of course, I am. Hurry up, or I won't give you a chance to transform!"

This was Kaido's logic – to learn something, you had to experience it. So, when teaching Thunder Bagua, he used Hassaikai, and when teaching Conqueror's Haki, he used Conqueror's Haki. When faced with a devil fruit ability, it made sense to use the devil fruit's power.

Arceus also intended for Yamato to quickly grasp this power, so he allowed Kaido to do whatever he wanted. Okuchi no Makami is a special vessel that he modified, so its appearance hadn't changed much, except for sharper teeth.

At this time, watching what was happening in the field, Jack, who had regained some strength, seemed to have thought of something.

"Lord Arceus, Lord Arceus."

"What is it?"

"Well, I also want to have an ability like Yamato and Maria. Can I?"

The young Ship King was a bit shy at this moment, but as the only one among the trio who was raised in poverty, he felt a bit envious.

"Sure, do you have a favorite animal?"

"Can it be an elephant? I think elephants are the strongest land animals."

"An elephant? Sure, but you'll have to wait a bit longer unless you want to become someone who cannot swim."

"Yes, I understand."

In a way, he was easily deceived. After receiving a positive response, he sat obediently on the side and didn't say anything further.

Meanwhile, far away in Paradise, some events were unfolding. During the two months that Arceus spent in seclusion working on the devil fruit, Mandrell arrived at the Shikkearu Kingdom's Kuraigana Island in the first half of the Grand Line with a shipload of weapons.

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