Back during the Uchiha incident, on the night Danzō made his move against Uchiha Shisui, Hagoromo recovered that pair of Mangekyō Sharingan. Afterward, according to him, he immediately destroyed Shisui's eyes. But was that really what happened?
Naturally not. Of course Hagoromo would not do that. One had to understand that obtaining those eyes could not be considered an easy matter. Naturally, he had not gone through all that trouble just to snatch them away and step on them like bubbles.
Many people coveted the power of the Sharingan. Although Hagoromo did not need that kind of power, that did not prevent him from keeping those eyes. Back then, when he said he would give them to Mirai as a birthday present, that should count as the truth, because he really did do so.
No matter what, the power of the Mangekyō Sharingan could not be underestimated. This was especially true because Shisui's eyes contained the unbreakable genjutsu, Kotoamatsukami.
However, he could not directly transplant these eyes into Mirai the way Danzō had done. After all, messing around with this kind of external equipment carried too much risk. Even with the physique of the Uzumaki clan, which shared the same ancestral bloodline, she probably could not completely resist that risk. So Hagoromo could not possibly carry out this kind of human experiment on Mirai.
Fortunately, before obtaining those eyes, he had already thought of a countermeasure.
Based on some things he had learned beforehand, as well as certain intelligence about the Uchiha and Senju that he had obtained from Shikkotsu Forest, Hagoromo knew that only when the powers of both sides were combined could certain "true powers" seemingly be brought out. The mutual combination of Wood Release cells and the Sharingan could reduce each other's risks at the same time. If the two remained balanced, then that power might even completely stabilize. At that point, the Sharingan would no longer simply be the Sharingan.
Unfortunately, however, Shisui's Mangekyō was not an Eternal Mangekyō…
But people could not demand perfection in everything. Being able to obtain Kotoamatsukami without accidents was already extremely fortunate. He could not ask for more.
And the method Hagoromo thought of to avoid the risk was…
A slug.
He valued the slug's trait of conducting chakra. With a little modification, it could produce unexpected effects in unexpected places. Thus, Hagoromo requested a very special split body from the main Katsuyu body. It was completely isolated from the main body and did not possess Katsuyu's consciousness.
Then Hagoromo carried out a series of modifications on this slug.
First, he entrusted Orochimaru, who had returned to Konoha at the time, with modifying the slug using First Hokage cells. While balancing out part of the danger, this objectively extended the "shelf life" of the Mangekyō Sharingan by a great deal.
The Mangekyō Sharingan was indeed powerful, but it was also abnormally fragile. A pair of eyes like these basically could not withstand several years of abuse. If both eyes' dōjutsu power were used at the same time to activate a major technique like Susanoo, they would probably go blind after only a few uses… Even Shisui's eyes were no exception.
But with Wood Release cells, which had extremely powerful self-repair ability, the lifespan of the Mangekyō Sharingan could be greatly extended.
So only after Orochimaru succeeded did Hagoromo connect Shisui's eyes to the slug.
In this way, the "trinity" of slug + Wood Release cells + Sharingan formed Mirai's "true external equipment." This was an extremely powerful plug-in that could directly bring a tremendous increase in combat power, while also avoiding, to the greatest possible extent, the harm brought by these "dangerous goods."
Even if one day the powers of the Uchiha and Senju failed or went out of control, it would not be a problem. They would simply remove the accessory and throw it away. Conversely, the slug was only sealed inside Mirai's body through a special formula. It did not have any substantial contact with her.
The Uzumaki clan's chakra passed through Hashirama's cells before acting on the Sharingan. This was already the ultimate balance of power and risk that Hagoromo could think of.
Of course, this did not mean there were no problems at all with using a major technique like Susanoo. In reality, it was still a restricted-use technique. First, this technique consumed chakra intensely. Just look at how frail and delicate Uchiha Itachi was and one could understand. Perhaps that had something to do with this technique, since the Uchiha were not a clan known for their chakra reserves… Though when this point was applied to an Uzumaki, it was somewhat different. For Mirai, this issue was not too serious.
But the main issue was the second point. A way of using the Sharingan like Susanoo brought an enormous mental burden. This could not be avoided no matter what.
So although piloting a Gundam looked rather cool, no matter how one put it, the pilot could not be said to be relaxed.
By relying on the Uzumaki clan's enormous chakra, the Susanoo Mirai used could not quite be called Complete Body, but it was not far off.
Susanoo was called the "Power of God." Although every Susanoo had its own characteristics, all of them originated from the image of the great tengu. Its outward manifestation was not only related to the Sharingan, but also to the caster's chakra. For example, even though it was the same pair of eyes, when Shisui himself used this technique, the Susanoo formed by the chakra spilling out from him was green. But now, when Mirai used it, it was azure blue.
Furthermore, just as Sasuke still could not use Itachi's Three Sacred Treasures after inheriting Itachi's eyes, Mirai's Susanoo was, as expected, "empty-handed"…
She could not use Shisui's drill-shaped spear.
Forget the drill-shaped spear. She did not even have a fake drill-shaped spear.
The weapon manifested by Susanoo might be related to the inner image reflected by the user's state of mind and other factors. The influence of the user's mental state was especially obvious. Therefore, Mirai would not have Shisui's weapon. She would only have her own weapon.
The moment Susanoo appeared, Nagato's Rain Tiger at Will Technique was nullified in another sense…
Damn it, for an invasion that could be seen with the naked eye, what was the point of using reconnaissance ninjutsu?
The bright color appeared within the Amegakure shinobi's field of vision through layer upon layer of rain curtains. That enormous body looked as if it had pierced into the clouds.
When different people used Susanoo, or when it was at different stages, its size differed. Taking a certain Madara's Complete Body Susanoo as an example, its height was roughly equal to stacking six Ultramen on top of each other.
As for Mirai's, although it was constructed from enormous chakra, she was not, after all, a member of the Uchiha clan. In addition, Shisui's eyes were only Mangekyō Sharingan, not Eternal Mangekyō Sharingan. So it was only about as tall as one small monster-killer.
But when a colossal object more than fifty meters tall approached step by step, its pressure was already more than enough.
What exactly did the Amegakure shinobi feel?
At this moment, mankind finally remembered the terror of being dominated by giants. Unfortunately, there was not a single 1.6-meter-tall clean freak in Amegakure.
The invasion of an unknown enemy using unknown ninjutsu was happening right under the Amegakure shinobi's eyes.
At this moment, Team Six still maintained a simple attack formation: Haku and Kimimaro were at the very front, positioned on the two sides. Susanoo was in the center, slightly behind them, while Hagoromo followed at the rear.
Because of the special weather conditions, Amegakure's buildings all had an extremely obvious tall, pipe-like style. But compared to Susanoo, they were slender and fragile.
Blocking Team Six's path was a stretch of lake water. Beyond it was Amegakure itself!
At this moment, Team Six had no intention of going around it. Haku and Kimimaro sprinted across the lake surface, while Mirai directly drove Susanoo straight through the deep lake. In fact, the chakra giant, which had originally only been walking, actually began accelerating after gathering strength for a moment!
…It started running too.
Haku and Kimimaro, who were moving ahead, did not plunge straight into Amegakure. Hearing the movement behind them and judging the distance, Haku shifted sideways and quickly stopped. At the same time, he began forming hand seals with both hands.
Then the lake water began rising in front of him and condensed into an ice wall. After that, the ice wall rose layer by layer, soon reaching over twenty meters tall.
Was this an ice wall?
No. As long as one observed from a slightly farther distance, one could see that this was a gigantic sword of ice, half inserted into the lake water.
When the high-speed Susanoo passed by this place, the water waves it stirred up made everything nearby sway unstably. Then, it gripped its hands at its sides, and the ice sword was taken into its grasp.
Then came the giant's sword strike!
The long ice sword split open the lake surface. Then, with a forward-rushing slash, several tower-like buildings standing at the very front of Amegakure were directly cut in half at the waist.
At this moment, time seemed to freeze for an instant. Only cold air continued rising from the buildings' smooth cuts.
Then…
The water waves lifted by the ice sword and driven forward by Susanoo's charge battered Amegakure.
The severed upper halves of the buildings, flung away by the giant's slash, also smashed back down into the village with rumbling crashes.
The helpless shinobi could not make any effective counterattack for a moment.
What? You ask about the protective effect of Amegakure's barrier?
Under this kind of heavy blow?
It did not exist.
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