If the eyes couldn't be trained, then a Ninja whose speed exceeded 30 frames per second would see everyone around them as a still picture, then awkwardly become blind.
While moving rapidly, he would constantly crash into walls because, in his vision, everyone around him was a still picture, slowly switching; 30 pictures per second were simply not enough for his eyes to distinguish his position in reality.
Therefore, young Kakashi, after inventing Chidori, was troubled by his speed being too fast and his eyesight unable to keep up. Later, he transplanted Obito's Sharingan, which solved the problem of insufficient dynamic vision.
"Hmm, Teacher, it seems we've returned?" Kimimaro looked around. The once lush Rouran Country was once again a scene of ruins.
They appeared in the ruins where they first fought the Ninjas sent by the Daimyo, with a desert still stretching outside.
"Oh, it's true, we're back! It's a shame, I didn't even get to see what my young father looked like at the Daimyo Palace..." Yukihime said regretfully. "It's a good thing you didn't go. During that period in the Ninja World, it was nothing but war. Lives were ruined everywhere, and people were suffering. There was nothing good to see."
"Kimimaro, you and Yukihime stay here, I'll go in and take a look..." Uchiha Nagi said.
"Understood, Teacher." Little Kimimaro nodded. He always acted first and then asked when it came to his teacher's words.
"What are you going in for?" Yukihime asked curiously.
"I want to see if the Dragon Vein can be absorbed..." Uchiha Nagi didn't hide anything and stated it directly.
He entered the underground structure alone again. Regarding this time travel to the Lost Tower, Uchiha Nagi had a theory: it might be a parallel world.
There were several reasons. The first, which couldn't stand scrutiny, was the rogue Ninja Mukade. Minato Namikaze actually knew that Mukade was a time traveler who arrived in this world six years ago, and also knew that his original timeline was from more than ten years in the future.
So, the question arises: The Sandaime sent him to eliminate Mukade. After eliminating him, why would Mukade be wanted again more than ten years later? Shouldn't the matter of time travel be recorded in an S-rank file and dealt with immediately? How could he still be chased by Naruto's team to the Rouran Country?
Moreover, Minato Namikaze sealed everyone's memories. When he returned, he probably couldn't describe the general process and wouldn't know that Naruto had been there. Only the Sandaime would know.
And there's another point: Naruto and Minato Namikaze, father and son, never recalled this experience in any of their interactions, whether after death or in the grand finale, even after Naruto became a Sage Mode user.
Sealing Technique, in itself, sealing memories in the brain is a bit far-fetched. It's not as strong as Sharingan genjutsu. How strong could the Sealing Technique Minato Namikaze hastily placed in their brains be? With the passage of time and the increase in the sealed person's strength, it would probably have broken the seal long ago.
No jutsu is perfect, including Sealing Technique. The passage of time erases everything.
However—
Uchiha Nagi blinked. Last time, he only copied half of Tsunade's Yin Seal and didn't get to see her unleash Creation Rebirth, which was a regret.
But now with Minato Namikaze's Sealing Technique, combining them should give him confidence.
That's right, he wanted to drain the Dragon Vein's energy and seal it away to use as a battery.
The difference from a Tailed Beast is that a Tailed Beast is like a renewable nuclear power plant. Inside a Jinchuriki's body, even if their Chakra is drained, they can recover full Chakra in a few days. The fact that they can recover vast amounts of Chakra without eating or drinking is baffling.
However, according to many people's theories, Tailed Beasts instinctively absorb natural energy from nature and convert it into Chakra, which is why they can produce infinite energy without eating or drinking. Because they are essentially a part of the God Tree, and what is the nature of the God Tree? Isn't it absorbing natural energy and converting it into Chakra?
But the Dragon Vein is different. The Dragon Vein is essentially underground energy, coming from the earth. No matter how extraordinary Uchiha Nagi was, he couldn't seal the entire earth's Dragon Vein into his body, could he?
The energy of mountains and rivers is not something like a Tailed Beast that can be converted into Chakra and sealed into a mental world.
The Dragon Vein is more like a collection of various energies within the earth, rather than a single Tailed Beast.
Therefore, what Uchiha Nagi could do was similar to Tsunade: extract the Dragon Vein's energy all at once, then use Yin Seal to store it in his body, and open the lock to use it as a backup in case of emergency.
Then once it's used up, it's gone, and he'd have to recharge, finding the Dragon Vein again to replenish it... but it's better than nothing, especially after seeing Naruto this time. Uchiha Nagi was both envious and jealous; such a vast amount of blue, wasted by Naruto, who sprinkles it around like water, was truly shameful.
Naruto's blue was more than double Uchiha Nagi's, and his recovery ability was terrifying. After a battle, others hadn't even recovered, but he had already regained half of his Chakra. He truly lived up to his future role as a protagonist who could use Chakra in tons... "This is the place. It seems the seal of over a decade has recovered well~" Uchiha Nagi took out Minato Namikaze's Kunai with a jutsu formula, and then took out a scroll.
He placed the scroll on the ground and began drawing various jutsu formulas with a brush. This was Minato's Sealing Technique. At the same time, on the other side of the scroll, he inscribed another type of jutsu formula, one invented by Mukade.
That's right, he analyzed and copied Mukade's jutsu for absorbing the Dragon Vein. During his battle with Mukade, his Mangekyo was constantly spinning, analyzing the jutsu and reasons behind his Dragon Vein absorption.
Finally, when he broke its body, he saw the jutsu formula carved on the outside of its core. It could absorb the Dragon Vein's energy with its puppet body, which obviously also required conversion. Mukade was a genius, a genius among geniuses, capable of inventing a Wi-Fi reception jutsu for wirelessly transmitting Dragon Vein energy.
What was even more amazing was that after receiving the Dragon Vein's energy, he could store it in his body, making him an existence like a Tailed Beast, and then, relying on countless puppets, become an immortal puppet army like Sasori.
If one day Mukade could establish his Wi-Fi reception base stations far enough, he could rule that far—
There was no 'if' anymore; now it all belonged to Uchiha Nagi.
"Shadow Clone Technique—" Uchiha Nagi created a Shadow Clone and began to experiment.
First, he extracted a little from the unsealed Dragon Vein using Mukade's jutsu, then sealed it into the Shadow Clone. Next, the Shadow Clone performed Tsunade's Yin Seal, combined with Minato Namikaze's Sealing Technique, merging them.
"It's done~" Uchiha Nagi looked at the Shadow Clone with joy. Unexpectedly, it succeeded on the first try. The Shadow Clone had the mark of Yin Seal on its forehead.
"How do you feel?" Uchiha Nagi asked the Shadow Clone. "Uh, it's alright. There's a lump in my body, and although I know it's Yin Seal, if I don't dispel the clone jutsu, I estimate I could live a long time with Yin Seal." The Shadow Clone closed its eyes and sensed for a moment.
"The seal needs a little energy to maintain the stability of the jutsu formula, but it's just a little. If you leave an opening in the seal and input Chakra into it whenever you have nothing to do, it should last a very long time."
Uchiha Nagi nodded, "Okay, I understand. Now I'm going to dispel the Shadow Clone and try."
He formed a few hand signs, and the Shadow Clone disappeared, feeding its memories back to the main body. At the same time, to Uchiha Nagi's surprise, after the Shadow Clone was dispelled, the small ball of Dragon Vein power sealed within it did not return to the main body with the Shadow Clone, but dissipated into the air as the Shadow Clone and Yin Seal vanished.
Uchiha Nagi pondered for a moment. From the Shadow Clone's feedback and experience, the Dragon Vein's power was very gentle and could be used by the human body, just like the Tailed Beast's energy. Moreover, it was even gentler than the Tailed Beast's Chakra, which is why Mukade could absorb it into his body. However, it would be best to filter it with something, just like Mukade did.
He created several more Shadow Clones and experimented one by one. The results were similar: the Dragon Vein's energy could not return to his body when the Shadow Clone was dispelled. This meant that to truly absorb the Dragon Vein's power, he could only use his main body.
He added Mukade's jutsu formula outside the Yin Seal to filter the absorbed Dragon Vein power, then prepared Minato Namikaze's Sealing Technique as the final lock. After everything was ready, Uchiha Nagi began his invention of an artificial nuclear battery.
He set up a seal at the entrance of the basement to prevent anyone from breaking in, then Uchiha Nagi took a deep breath.
"Here we go..." He formed a few hand signs and then pressed them onto the scroll. This was Mukade's jutsu formula, used to absorb the Dragon Vein.
Vast and clear energy began to surge into his body continuously, finally gathering in his dantian, forming a seal similar to a Jinchuriki's. After ten minutes, Uchiha Nagi frowned. The power of the underground Dragon Vein was unexpectedly abundant. Perhaps it was due to being sealed by Minato Namikaze for over a decade, causing it to gush out wildly now that it was unsealed.
Before long, the energy surging into his body was almost as much as a Tailed Beast's.
Uchiha Nagi gritted his teeth. He couldn't stop now; he could only persevere. He formed a few more hand signs and pressed them onto his stomach, where Minato Namikaze's Sealing Technique appeared, firmly locking the Dragon Vein's vast energy to prevent it from going berserk.
[No, if this continues, I'll explode before I can finish absorbing and sealing it.]
Uchiha Nagi realized he had been overconfident. Unlike when Mukade absorbed the Dragon Vein, the current Dragon Vein had accumulated over a decade of energy. Once the seal was opened, it gushed out all at once, like a dam releasing water, unstoppable.
"Susanoo—" Uchiha Nagi's eyes snapped open, activating his Mangekyo, and used the Chakra-consuming Susanoo to release this excess energy.
Boom!!
There was a huge explosion in the basement. Kimimaro and Yukihime outside looked up to see an enormous, mountain-like skeletal giant appearing before the Dragon Vein.
"Ah ah ah... Get out—" Uchiha Nagi's eyes were bloodshot as he roared.
Vast Chakra began to construct the skeletal giant's body: first flesh, then skin, and finally armor and weapons.
Then Susanoo's body continuously surged, its frame slowly growing from a small mountain to a large mountain, expanding wildly—
Finally, a Complete Body Susanoo, as massive as an ancient giant or a mountain, appeared in the center of the ruined Rouran Country.
The red giant spread its arms, baring its huge mouth, and roared at the sky like a returning deity:
[Ooh—]
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