Start by Eating Jake Jake no Mi

Sleeping in his castle, no one bothered Masa, and everyone continued their lives as they cleaned up all the mess caused by Teach and his pirate groups. 

At the same time, they were glad to be protected by Masa, and if possible, they wished that such a day would continue, especially after they saw Dalton had passed away. 

Even Dalton, the strongest guy on the island, died under the attack of pirates.

Then what about those who were just normal people? 

So, while they felt a bit nervous, their representatives came to Kureha, talking about their opinions as they discussed everything, which made Kureha think that those people weren't idiots. 

Still, considering how many excellent doctors came from this land, it was normal for many of its people to be stupid. 

Yet, even so, there were still many idiots on this island, too. 

Looking at the dead body of Dalton, Kureha sighed inwardly, but she didn't say much since you reap what you sow. 

"Have you woken up, Masa?" 

Meanwhile, Masa, who had just woken up, was greeted by Perona, who was so close to his face. 

"...can you step back for a while?" 

"Oh, yeah." 

Masa looked at the three that gathered in his room and asked, "What's wrong?" 

Carina was speechless and said, "We can't stay with you if you are sleeping?" 

"It means that we're worried," Kalifa added. 

"....." Carina. 

"I am fine." Masa stretched his body again and said, "Can you get something for me to eat?" He could eat the air, but its taste was quite bland, and he wanted to eat something real. More importantly, it was dangerous since if he ate air, then Carina, Perona, and Kalifa wouldn't be able to breathe and might die as they couldn't breathe. 

"Let me get you!" Perona quickly left to get food for Masa, which Kalifa also followed. "I will help you." 

When the two left, Carina asked worriedly, "Was this opponent so strong?" After all, it was the first time seeing Masa take a rest, which showed the consumption of his energy was high, and frankly, it made her worried. 

"He was, but I defeated him." 

Yes, even if Teach was defeated by him, it didn't mean that it was an easy battle, as Masa's energy consumption was high, especially when he kept using a powerful technique so many times. 

'But my sword of light wasn't that powerful.' 

Masa thought that his sword of light could work like Excalibur or EA in the world of Fate, but it seemed that his power was far from enough. 

Pika Pika no Mi was good, and there were many things that one could do with a light, but he realized that the damage caused by a light was low. 

However, it wasn't because the power of light was weak; it was because he hadn't tapped all the potential of the Pika Pika no Mi, yet this was normal, especially when all Masa were busy with many of their own research. 

"What was his power? I saw that it was kind of dark." 

"Yami Yami no Mi." Masa didn't think that it was necessary to hide all of his abilities from his women, but then again, he didn't need to show everything. 

"Yami Yami no Mi? So, the power of darkness?" 

"Yeah." Masa opened his palm, and a darkness emerged from it. "It is mine now." 

"Wow..." 

Carina was surprised and happy since Masa had become stronger. 

"Can I touch it?" 

"Go ahead." 

"Okay." Stretching her hand, Carina touched the lump of darkness curiously before she felt weak all of a sudden. "Huh?! I can't use my Devil Fruit!" 

"Yeah. This Devil Fruit is special." 

This was the specialness of the Yami Yami no Mi, the Devil Fruit that was sought by Blackbeard, so much that he threw away his stable life as a member of the Whitebeard Pirate without hesitation to get this Devil Fruit. 

It was a unique type of Logia fruit that allowed him to control the power of darkness, but despite being a Logia-type, it didn't give the user the ability to turn their body into darkness, like how any other Logia-type, yet if one thought that it was weak, then they would be sorry. 

Darkness. 

While in the modern world, it was just the absence of light, Masa thought differently, especially in religion; it was the two matters created after a void was darkness. 

Light and darkness. 

Day and night. 

Yang and Yin. 

The opposite of the light had always been the darkness, so one could tell how powerful the darkness was, right? 

On his body, not only the power of light but also the power of darkness resided. 

Two powers that would collide somehow mixed together, yet this power of darkness wasn't perfect. It was quite similar to the power of the light of the Pika Pika no Mi, which forced him to devour the fallen angel to gain the holy property within his light. 

So, similar to the Pika Pika no Mi, if Masa wanted to add an occult-type property of darkness into the Yami Yami no Mi, then he could only devour a creature of darkness. 

'Well, I am a devil.' 

Yet, even if he was a devil, a creature of darkness, his power wasn't even related to darkness, which made him helpless. 

'However, this power is still strong.' 

What is darkness? 

This could be answered with many different answers; basically, it was an abstract existence, which was why, despite being a Logia-type, it didn't give the user the ability to turn into an element, but the basic applications of the Yami Yami no Mi allowed him to manipulate darkness in the form of gas, liquid, or even solid, and at the same time, allowed him to have a unique property of gravity, which was absorbed. 

Darkness and absorption. 

If the two combined, what would come to mind? 

Blackhole. 

The further development of Ton Ton no Mi might enable him to create a black hole, but the Yami Yami no Mi might allow him to control the black hole. 

"So this Devil Fruit can absorb and completely nullify the powers of other Devil Fruits?" Carina was dumbfounded. 

"Yes." 

"Aren't you invincible, then?" 

If Masa could nullify all powers, then wasn't he the strongest?

"Did you forget about Haki?" 

"Oh, right!" 

With Haki, one could nullify the effect of the power of the Devil Fruit. 

Or rather, the master of Haki could even be immune to the power of Devil Fruit. 

"Still, you are basically invincible, right?" Carina didn't think that anyone could defeat her man. "Even if you are about to lose, you can run away with the speed of light. By then, who can even chase you?"

Masa only smiled, but then again, he really wondered what the world of One Piece thought of the Hito Hito no Mi, Model: Nika being the strongest Devil Fruit. 

Still, if he had to give an answer, then—

Fate. 

Probably due to devouring Blackbeard, Masa knew well how fate worked in this world. 

Everything was predetermined. 

Who was the bad guy? Who was the good guy? Who was the villain? Who was the savior? 

Everything had been determined from the beginning in this world, and those who weren't chosen could only succumb and live in torment in this world until their savior, Nika, came. 

Yes, all of their hard work, struggle, and efforts were meaningless, and all they could do was just wait for fate and pray for their savior, Nika, to come. 

However, Yami Yami no Mi was the only existence that could break that fate since it was the only ability that allowed the user to nullify the power of Devil Fruit, which meant causing a strong Devil Fruit, even Nika, to be deactivated. 

Still, because of that, Masa knew well that to maximize the power of the Yami Yami no Mi, then he could only choose that Devil Fruit, which made him unable to eat the Goro Goro no Mi, the favorite Devil Fruit of Masa of Mahouka. 

'Sorry, I will make sure to get that later when the fifth Masa appears.' 

Yup, to eat the Goro Goro no Mi, Masa could only wait for the fifth Masa, but before that, he had to talk about his next destination since as he could eat eight Devil Fruits, he had to maximize it fully.