Start by Eating Jake Jake no Mi

"Bane Bane no Mi?" 3x

As their minds became four times stronger with four Masas, naturally, they knew this Devil Fruit, which made their expression weird, but at the same time, because of that, they also understood how powerful this ability was as it was the advanced version of Hito Hito no Mi, Model: Nika. 

Yes, compared to the savior, Nika, who could only manipulate rubber, the Bane Bane no Mi could manipulate the concept of elasticity. More importantly, as someone ate this Devil Fruit, not only could their body bounce most things, but their body was also as durable as the body of a spring, which made them practically immune not only to a blunt weapon but also a sharp weapon, too as a spring is made from metal.

At the same time, Masa felt that this Devil Fruit should also be able to mimic the feat of Nikyu Nikyu no Mi, the Devil Fruit eaten by Kuma, which made him able to bounce most things in this world, including the conceptual factors such as sickness, exhaustion, and even strength, but far, far better since unlike Nikyu Nikyu no Mi that could only bounce by using the paw-like palms of the user, the Bane Bane no Mi could do such a feat with the entire body. 

In other words, Bane Bane no Mi was a combination of a Nika, Nikyu Nikyu no Mi, and even a metal-related Devil Fruit, which showed how impressive this Devil Fruit was. 

If Masa of One Piece wanted to get a good Devil Fruit in the nearby area, it would be this Devil Fruit. 

"Wait, what about Goro Goro no Mi? It is close, too, right?" 

"Goro Goro no Mi..." 

In the past, they might have thought so, but as they grew stronger and stronger, learning more knowledge, especially about the universe, physics, and anything related, they admitted that lightning was a good element so—

"That's true." Masa nodded. "Instead of Bane Bane no Mi, it is better to choose the Goro Goro no Mi." 

Yes, Bane Bane no Mi might be good, but it needed time to improve, and at the same time, unlike Goro Goro no Mi, the Bane Bane no Mi couldn't become a source of energy for various gadgets and even home he would create by using the Gasha Gasha no Mi. 

Still, Masa had to admit that the Bane Bane no Mi had great potential, especially because a fight was good, so he thought of getting one as he could use the Jake Jake no Mi to use this Devil Fruit. 

"So, if you can't get the Wapu Wapu no Mi, then Goro Goro no Mi, but if you can't get the Goro Goro no Mi, then get the Bane Bane no Mi." 

If it was to get the replacement for the Wapu Wapu no Mi based on the closest location, then Masa of One Piece should get those two Devil Fruits. 

"But you know, what you should try to get is the Devil Fruit that can affect the aspect of metaphysics." 

Miracle. 

This was the best way to describe the Devil Fruit since even if some Devil Fruit appeared strange and even lame, they could break the law of physics, manipulate the concept itself, and do something that shouldn't be possible, and because of that, Masa of One Piece should have focused on the ability that could affect the abstract aspect within reality such as metaphysics, which is a branch of philosophy that examines the basic structure of reality.

"Metaphysics?" 

"Reality, including existence, objects, and their properties; possibility and necessity; space and time; change; causation; and the relation between matter and mind." Masa of Mahouka looked at everyone and said, "Any Devil Fruits that can affect and include all of those aspects are out of target." 

"What about Goro Goro no Mi? Don't you want it?" 

"I want it, but it isn't a priority for us." Masa of Mahouka looked at everyone and made determined eyes. "Wapu Wapu no Mi is our priority, but Giro Giro no Mi is also good." 

"...do you want me to kill Viola?" 

All of them knew the power of the Giro Giro no Mi, and they also understood why Masa of Mahouka wished to get this Devil Fruit, but if they did get this Devil Fruit, then they would kill Viola! 

"Can you just use your Yami Yami no Mi to absorb the Devil Fruit without killing the target?" 

"...." 

"...I should be able to do that." 

Masa of One Piece felt that he should be able to absorb the Devil Fruit without killing the opponent by using the Yami Yami no Mi. 

"...why didn't I think of it?" 

"It's normal, isn't it? All you face are criminals before you, so why should you not kill them?" 

Yes, all of those Devil Fruits that Masa had taken originated from criminals, but if it was a beautiful heroine, then... naturally, Masa of One Piece needed to be merciful, right? 

Somehow, all Masa could imagine that Masa of One Piece would save Viola and her kingdom in exchange for her Devil Fruit. 

"You scoundrel!" 

"...I haven't done anything?" 

"But you plan to, right?" 

"...." Masa of One Piece. 

"Anyway, no matter what, you should get a Devil Fruit that appears abstract instead of concrete." 

"Abstract and concrete?" 

"Concrete is like Zoan. If you eat a Bison fruit, then you can become a bison and gain its traits, but that's it. You won't gain anything else, and you are just like that." 

In other words, Masa of One Piece shouldn't have eaten any Zoan type of Devil Fruits anymore. 

"Logia, too." 

"Huh? Really?" 

"Yeah, the Pika Pika no Mi and Yami Yami are good enough, but the others? They aren't that good since they are concrete." Masa of Mahouka was standing in front of everyone as he explained why being "concrete" wasn't good. "Let me give you an example such as Magu Magu no Mi." 

"Magu Magu no Mi?" 

"In the hands of Akainu, it might appear that this ability is powerful as it can even destroy a country or more, or rather, it might even be able to destroy a planet if one wishes to." 

The Magu Magu no Mi could really destroy a planet by manipulating the core of the planet and destroying it from within, as the core of the earth was made of magma, but that was it, and planet destruction was the limit of the Magu Magu no Mi.

Was it weak? 

Of course, their goal was far greater than that! 

"However, this is just on the scale of the planet, but our goal is so far away, right?" 

"Yes." 3x

Their goal was to become stronger within the universe or even the multiverse, and because of that, they couldn't limit themselves to an ability that couldn't improve to such a level. 

Anything that had a concrete description within reality and could even be explained logically with the law of physics, such as Zoan, a few types of Logia, and some Paramecia, wasn't good since their potential was limited. 

However, some Logias were good since some elements were part of a myth and a miracle, which could affect that certain aspect that couldn't be explained by everyone, which was known as an abstract. 

"If I have to say, it is like a fire." 

"Fire?' 

"Fire is not just a fire, but it can also represent many things, such as bravery, passion, and charisma. It is such an element that can represent an abstract idea that you should get." 

"I understand." 

Whether it was his Pika Pika no Mi or Yami Yami no Mi, it could also represent an abstract idea of a holy and an evil. 

So, all of the Devil Fruits that he should get next were something that was still within the realm of a mystery, something that couldn't be explained in concrete ideas. 

Still, there was no doubt, if possible, that they wished for him to get the Wapu Wapu no Mi, but where?

"Can you just use the "Voice of the Future"? If you ask it, then it might lead you to the owner of the Wapu Wapu no Mi." 

"...can it be done that way?" 

"Anyway, it won't hurt to try, right?" 

"..." 

That's true. 

So, Masa of One Piece tried to use the "Voice of the Future" to search for the owner of Wapu Wapu no Mi, then—

"How?" 

"...." 

Masa's lips twitched, realizing that he was such an idiot, he thought, but he knew that everyone was waiting for his answer, so while he showed an awkward expression, he said, "...it seems the Wapu Wapu no Mi has been eaten by Van Auger." 

"..." Everyone. 

Why the hell were we having this discussion then?! 

Still, this was a good discussion, and all of them were clear about what kind of direction they should aim for next. 

"Go get the Wapu Wapu no Mi!" 

"I'm on it!" 

Nevertheless, Masa of One Piece was on his way to get the Wapu Wapu no Mi.