In the ninja world, the Land of Water was an overseas archipelago, a nation formed from numerous, disconnected islands of various sizes. Conquering it island by island would be an exhausting endeavor.
The Land of Lightning, on the other hand, was a high-altitude region, similar to the Tibetan Plateau of Uchiha Nagi's previous life. This was why the Fourth Raikage and his people had darker skin. It wasn't because they were black, but because the intense ultraviolet radiation at such high altitudes naturally darkened the skin.
The Land of Water had never considered attacking the Land of Lightning, for the same reason the Land of Lightning didn't attack them. The high mountains and harsh environment made it an unprofitable venture. Compared to attacking the difficult-to-conquer Land of Lightning, it was far better to attack the fertile and beautiful Land of...
The other great nations felt the same. And so, the unfortunate Land of Fire was repeatedly targeted in the great wars, as everyone wanted to carve up a piece of the most fertile land on the continent.
Uchiha Nagi resorted to his old trick, using the unfortunate fish of the sea to pull his boat. He was using a light speedboat, which moved very quickly. Every time he passed an island, he would circle it on his map and then continue his search for the next one.
Occasionally, he would fly into the sky to check for any missed spots. As for how he flew, it was, of course, with Magnet Release.
Using Magnet Release for combat was one thing, but flying over the vast, open sea for dozens of days? Who had that kind of chakra tonnage?
His research into Magnet Release was still getting nowhere. Electromagnetism, as one of the four fundamental forces of the universe, was not so easily developed. Otherwise, Nagato wouldn't have only developed two techniques related to gravity. The Third Kazekage's "Magnet Release" was actually more like ninjutsu. He hadn't even crossed the threshold of true Magnet Release. You could tell because he still needed to carry iron sand with him into every battle. Electromagnetism was for more than just attracting iron.
If the Third Kazekage had mastered electromagnetism, even just a little, he wouldn't have needed to carry iron sand. He could have fought empty-handed, just like Nagato.
Electromagnetism, also known as the electromagnetic force, is the general term for the force experienced by electric charges and currents in an electromagnetic field. Some refer to the force on a current-carrying conductor in a magnetic field as the electromagnetic force, and the force on a stationary charge in an electrostatic field as the electrostatic force. It is the force that arises between charged particles; it is the second strongest of the four fundamental forces.
If a person could control electromagnetism, it would be terrifying. Could they easily summon the lightning from a thunderstorm? The human body's magnetic field, trees, rocks, water molecules—every substance has electrons and a magnetic field in its molecular structure. At its peak, one could even control the magnetic field of the earth, of the entire planet. What was the human body's magnetic field in comparison? With a casual wave of his hand, the Third Kazekage could disrupt a person's magnetic field, and it wouldn't matter if tens of thousands of people came at him; they would all be cannon fodder.
Of course, the same applied to Nagato. Gravity is also one of the four fundamental forces. Unfortunately, the Rinnegan had too many mysteries, and Nagato couldn't focus on just one. He developed so many abilities at once that he ended up a jack of all trades, master of none. Every time he used Shinra Tensei, he needed to wait five seconds before using it again. What was that if not a lack of mastery?
"Perhaps Madara's Limbo: Border Jail is an advanced version of gravity control," Uchiha Nagi mused. He had a pair of iron sand wings on his back. He flew up, took a look around, and then landed back on the boat, changing direction.
In his past life, on the forums, after learning about the Rinnegan's major abilities, many people thought the Deva Path's Shinra Tensei was undoubtedly the strongest because it controlled gravity. But what happens when Shinra Tensei is developed to its extreme?
Madara had incapacitated all nine Tailed Beasts with a single blow. Uchiha Nagi couldn't think of any other explanation. There was only one possibility: after awakening the Rinnegan and familiarizing himself with its abilities, Madara chose to focus on developing the gravity control of the Deva Path, one of the four fundamental forces.
Therefore, the nine Tailed Beasts, which seemed as heavy as mountains, became as light as feathers under the control of the fundamental force of gravity, easily sent flying.
Madara might not have known what the four fundamental forces were, but relying on his instincts and years of combat experience, he sensed that the Deva Path's ability was the strongest of the Six Paths, and so he focused on developing its control over gravity.
It was settled. There was a high probability that Madara's Limbo: Border Jail was an advanced version of Shinra Tensei, a mastery of the fundamental force of gravity.
The end of all magic is science.
Uchiha Nagi narrowed his eyes. What's the use of a Susanoo, a Wood Golem, a summoning animal, or a Tailed Beast? In the face of the four fundamental forces, all these behemoths are nothing but mere specks of dust.
"But for now, since I can't master electromagnetism, I can consider developing a powerful technique first. Like a railgun."
Uchiha Nagi placed a kunai in his hand and tried to use Magnet Release to accelerate it, just like Misaka Mikoto from the anime. If he could succeed with this technique, it would be no less powerful than Nagato's Shinra Tensei.
Swoosh—
The kunai flew out at a speed that broke the sound barrier, but Uchiha Nagi shook his head. It was a failure. A railgun wasn't this slow. If he had succeeded, the instantaneous acceleration and various pressures would have pulverized the kunai.
"Oh well. There's still plenty of time. I'll research it slowly." Nagi didn't expect to succeed in a few days with a technique that took Madara half a lifetime to develop. He would take his time. He had the advantage of an entire world's worth of physics knowledge over Madara.
The island of the nature-energy-filled summoning beasts would certainly not be recorded on any nautical chart. Although the Land of Water and the Land of Lightning had trade relations, that island would never be revealed to the world. All Uchiha Nagi could do was divide the map into sections, and every time he reached a new area, he would fly up to check for any missed islands before continuing his search.
"Obito, you look terrible."
In a cave somewhere, a battered Obito emerged from the Kamui dimension. He had returned to the mainland, to the Land of Rain. He had gone to the Land of Water after receiving a message from White Zetsu that the Mist Village was planning a collective rebellion. The Fourth Mizukage was usually an imposter played by a White Zetsu, who would absorb some of the Mizukage's and the Tailed Beast's chakra to issue orders. Obito only went over periodically to reinforce the Mangekyo's genjutsu.
He had originally thought it would be a situation like the Kaguya clan's demise, but he hadn't expected a full-scale rebellion. Fine, he had thought. I'll just control the Three-Tails and wipe out the entire Mist Village in one go.
However, Obito had grown complacent. He never anticipated that Mei Terumi and her faction had hired outside help, an ally who knew his abilities inside and out. And he had arrogantly tried to suck Uchiha Nagi into his Kamui dimension.
His Kamui was more like a key that opened a door to another dimension. The powerful suction that followed could trap even Kage-level powerhouses, because the suction came from the Kamui dimension itself. That was why he had tried to suck in Minato Namikaze, and why he had tried to suck in Konan.
In the end, Uchiha Nagi, who knew Obito's abilities, had used Konan's trick to defeat him. Unfortunately for Nagi, Obito had a spare three-tomoe Sharingan transplanted under his mask. He had activated Izanagi in time.
"My, my, how did Obito lose an eye? Did you use Izanagi? What does death feel like? Is it better or worse than the feeling of taking a dump?"
A white figure emerged from the ground. This was Tobi, one of the White Zetsu who was always curious about what it felt like to defecate. He was the most unique of all the White Zetsu, aside from the original. He could attach himself to a host, becoming a biological suit of armor that enhanced their combat power.
"Hmph. This time was an accident. I never expected him to know my secrets. This is the second time," Obito frowned. Besides Black and White Zetsu, no one knew about his Kamui ability. How on earth did Uchiha Nagi know? To say that Nagi didn't know his secrets, Obito wouldn't believe it if you killed him. The first time, Nagi had cut off his arm. The second time, he had burned him to death.
Thinking of this, Obito looked suspiciously at Black and White Zetsu. Could they have leaked his abilities to Uchiha Nagi?
"Obito? You don't suspect me, do you? But I'm completely devoted to you! Waaaaah!" Tobi immediately started to cry.
Black Zetsu spoke slowly in his raspy voice. "Obito, no one would have leaked your information. And on the night of the massacre, Uchiha Nagi's strength was negligible. He had no value."
Obito relaxed slightly. "I'm not suspecting you. I just can't figure out how he could know my abilities without ever having met me before. Each time, he's been able to target my weaknesses."
If he hadn't had a spare three-tomoe Sharingan this time, he would have died. After reviving with Izanagi in the Kamui dimension, Obito had left. Since his opponent knew his secrets, it was pointless to stay and fight. He had more important things to do. Just like when he had faced Minato Namikaze, he had chickened out.
Obito touched his stomach. The seal his teacher had left on him had been with him his entire life. Fortunately, while the Flying Thunder God: Second Step couldn't be removed, it could be sealed. The cure-all of sealing jutsu solved everything.
"I will find a way to kill him. If he is not eliminated, he will always be a hidden danger. I cannot allow any accidents to jeopardize the Infinite Tsukuyomi plan," Obito said with a dark expression.
"But, Obito, it seems Nagato is interested in recruiting him into the Akatsuki. Besides sending Kakuzu to find him, he also asked me to report any news about him at any time," Tobi said, scratching his head.
Although Konan had her own intelligence network, she sometimes used the White Zetsu to gather information. After all, the White Zetsu paparazzi group was incredibly efficient. And on the surface, Nagato was still the leader of the Akatsuki.
"Interesting. Give Itachi a copy of his file. I'm looking forward to this," Obito murmured to himself.
Whether in the real world or the world of the Infinite Tsukuyomi, Obito's fear of Itachi surpassed even his fear of Nagato. It was probably the innate sense of inferiority a slacker feels before a genius.