Konoha.
Hokage's Office.
Hiruzen Sarutobi paced back and forth, his expression anxious.
Soon, the door to the office was pushed open, and a young figure stepped in.
"Hokage-sama, you called for me?"
"Minato, you're finally here."
Hiruzen's face lit up with relief as he quickly approached.
"Recently, our scouts in the Land of Grass reported discovering a large-scale movement of Iwa ninjas."
"Is war imminent?" Minato's expression grew severe.
"Yes! I've already held a high-level meeting to discuss the matters related to the war. But there's another task I need to assign to you."
Hiruzen's face darkened slightly.
"Just a day ago, I sent Hyuga Satoru to the Land of Grass to investigate, and now we've discovered a massive mobilization of Iwa ninjas. We've had no word from him since. I'm worried..."
"I understand, Hokage-sama."
Minato took a deep breath, speaking with determination.
"I'll set out for the Land of Grass immediately."
"Good. Hyuga Satoru is Konoha's only dual bloodline limit user and a precious first-generation bloodline holder. We cannot afford to lose him. Minato, you're Konoha's fastest ninja. With you going, I can rest assured."
"Understood."
...
Land of Grass.
Satoru basked in the rising morning sun, closing his eyes and taking a deep breath.
"Finally, my electromagnetic force has levelled up to Level 4."
He opened his eyes, a smile playing on his lips.
Without the pressure from the Iwa ninja squad, it might have taken longer to break through. Now that the Third Great Ninja War had begun, he had nothing to fear.
Estimating roughly, at Level 4, he had undoubtedly entered the ranks of Kage-level strength!
Material Disassembly!
This was the new ability that came with his electromagnetic force upgrade.
But this disassembly had a suffix: Nano-level.
Now, he could easily disassemble any metal into nano-sized particles, controlling them with electromagnetic force to form a magnetic fluid.
The ability he used to attack the nearly hundred pursuing Iwa ninjas was to disassemble the metal particles underground into magnetic fluid, which erupted from the ground like symbiotic venom, slaughtering the Iwa ninjas.
Satoru had long understood the terror of magnetic fluid.
Previously, he could only use magnetic fluid from the beheading sword in Tyrant mode. Now, he could freely create large amounts of magnetic fluid.
Even forming a Gundam wasn't out of the question!
Common metal atoms typically have diameters of less than one nanometer. Copper atoms are about 0.25 nanometers, and iron atoms are around 0.125 nanometers.
At the nano-level, magnetic fluid particles were very close to the atomic scale, each particle containing dozens or hundreds of metal atoms.
But if he tried to break them down further, he felt a tremendous resistance.
This resistance stemmed from the limitations of his control over electromagnetic force.
Satoru speculated that when his electromagnetic force could operate at an atomic scale, it would lead to a revolutionary transformation!
Some of the extremely terrifying abilities he conceived required atomic-scale electromagnetic force manipulation.
For example, creating a nuclear bomb by hand.
In addition, his level upgrade also enabled him to develop a very famous ability.
Railgun!
Misaka Mikoto's signature move!
In fact, if it had been just an imitation, Satoru could have done it long ago, but it wouldn't have been as powerful as it is now.
Common types of railguns are divided into coilguns and railguns, with two less common types: electrothermal guns and heavy-duty railguns.
Electrothermal guns use evaporated high-pressure plasma to accelerate projectiles, a relatively complex principle.
Heavy-duty railguns are a new form of railgun, with substantial resources invested by the US, touted as the future structure of super-high-speed space-based railguns.
So-called space-based weapons use satellites to deploy high-density tungsten rods from Earth's orbit. The rods accelerate through Earth's gravity, acting as a pure kinetic weapon.
Its effect is comparable to a meteor striking Earth.
Dubbed the Rod of God!
In an era where nuclear weapons are deterrents, the Rod of God, a space-based kinetic weapon, is seen as the best alternative to nukes, avoiding nuclear retaliation and humanitarian issues, effectively a nuclear weapon without the fallout.
But this is an idealistic concept, facing many practical problems and suboptimal power.
The super-high-speed space-based railgun combines the railgun with a space-based kinetic weapon.
Using both electromagnetic acceleration and Earth's gravity capture for speed.
Rod of God 2.0.
Satoru speculated that Misaka Mikoto's Railgun might also be a form of heavy-duty railgun.
When the coin is tossed, the electromagnetic force forms a rectangular coil around its front and back. As the coin spins and falls, the magnetic field energy accumulates in it.
Finally, a flick of the finger.
Railgun!
That's why Misaka Mikoto always tosses the coin high and says a lot of lines before her ultimate move, possibly not just for show but to secretly charge up.
Then there's the range issue.
In Academy City, Mikoto's coin quality was poor, burning up after 50 meters due to high temperatures. But Satoru used high-strength magnetic fluid coins, vastly improving heat resistance.
The endless trench before him was proof.
Satoru exhaled deeply, feeling incredibly light.
With Level 4 electromagnetic force, as long as he didn't encounter one of the few perverts in the ninja world, he could walk sideways without issue.
He even looked forward to the upcoming war, wondering how his terrifying abilities would shine in battle.
Due to the physical tempering from levelling up, despite fighting all night, he felt no fatigue, only invigorated, with all his chakra restored.
Without delay, Satoru decided to return to Konoha.
From the information obtained, Iwagakure's main force had reached the Land of Grass, steadily approaching Konoha.
Whether or not Hiruzen received this news, he had to return and report it.
Leaping swiftly across the grasslands towards Konoha, he suddenly frowned.
Ahead, a powerful biological magnetic field approached quickly.
"A chance encounter?"
Activating his Byakugan, Satoru's face turned peculiar upon seeing the figure.
No wonder the speed was so fast; it was the ninja world's fastest man, Namikaze Minato.
He had just used Minato's name to trick Tonton; hopefully, Minato wouldn't find out.
Thinking this, Minato arrived.
"Great, I'm not too late!"
"Thank goodness you're alright, Satoru."
Seeing Satoru's strange expression, Minato hesitated, then scratched his head with a polite yet awkward smile.
"Oh, right, I almost forgot; you probably don't know me."
"Let me introduce myself. I'm Kakashi's jonin instructor, Namikaze Minato."