Until night fell and Miyamoto Ichirō called him to eat, Sora finally temporarily stopped his training.
While eating, his fingers were still unconsciously trembling slightly, obviously still savoring that feeling of ultimate control.
'The Super Strength training is harder than imagined, but the improvement in chakra control is also very significant. This gradually refined sense of control seems to be helpful for learning sealing techniques as well?'
Sora's thoughts stirred, and he became pensive.
The study of sealing techniques also relies heavily on precise chakra control, especially when constructing sealing formulas. The output must be stable, the form must be accurate, without the slightest deviation.
The fine control ability honed through Super Strength training can exactly be transferred to the practice of sealing techniques, promoting the stable construction of sealing formulas.
Conversely, the extreme control required by sealing techniques can further refine the delicate mastery of chakra, thereby advancing the grasp of Super Strength.
'It seems different abilities are not isolated, but rather echo and complement each other.'
'Or perhaps, the fine control of chakra is the underlying logic of all high level ninjutsu!'
...
Early the next morning, by the small river behind the orphanage.
After finishing his morning taijutsu training, Sora sat on the ground to rest and did not continue to bury himself in intensive Super Strength practice.
After long accumulation, especially the tireless learning by his shadow clones, he had basically digested the contents of the book "Detailed Explanation of Uzumaki Clan Basic Sealing Techniques".
The outlining of those basic sealing formulas, the principles of chakra transmission, the construction of the simplest sealing formulas... he had already mastered about seventy or eighty percent.
To go further, he needed deeper, more specific knowledge of sealing techniques.
'It's time to go take a look at the Anbu ninjutsu repository.'
Sora made his decision.
His goal was clear, higher level Uzumaki clan sealing techniques.
This would not only help him train his Super Strength, but was also part of a plan he had made a long time ago.
His chakra amount had always been a weak point. The development of the Azure Dragon Fruit had currently entered a phase of slow, gradual progress. The size of the complete form Azure Dragon depended purely on grinding time. Elemental mastery was slightly better, but without awakening, it also had its limits.
Therefore, Sora shifted his focus to the "chakra power bank" plan, and the target he selected was, the Dragon Vein!
'The Dragon Vein's energy is vast and stable, but it has already been sealed by Namikaze Minato. To have designs on it, I must first undo the seal.'
The prerequisite for undoing the seal is figuring out what seal Namikaze Minato used.
This requires speculation based on the sources of Namikaze Minato's sealing knowledge, which mainly comes from two parts.
First, his teacher Jiraiya, who might have taught some sealing techniques from Mount Myōboku.
Second, his current girlfriend, future wife, Uzumaki Kushina, a genuine direct descendant of the Uzumaki clan!
Among these, the sealing techniques of Mount Myōboku are too elusive and are related to senjutsu energy like toad oil, unsuitable for Sora's current situation. In comparison, the Uzumaki clan's sealing techniques are the orthodox path and the ones he is most likely to access now.
'As the Nine Tails jinchūriki, Kushina is under tight protection. I can't get close to her at all.'
'But the Anbu ninjutsu repository should have some high level sealing technique scrolls originating from the Uzumaki clan. After all, after the fall of the Land of Whirlpools, a large amount of its legacy was scattered. As an ally, Konoha collecting some of it is reasonable.'
Sora sat on the ground and stroked his chin, then got up and headed for the Anbu underground headquarters.
…
Anbu underground base.
Sora went straight to the ninjutsu repository and found it was still that Anbu clerk wearing the Suzuka mask on duty.
'Why is it still him... Doesn't the Anbu have anyone else who can do this job?'
Muttering inwardly, Sora remained expressionless on the surface and handed over his identification tag.
"Exchange for sealing technique scrolls."
Suzuka took the identification tag, verified it proficiently, and pointed to the nearby catalog.
"Look for yourself. Same rules."
Sora picked up the thick catalog, flipped directly to the sealing technique section, and carefully browsed through it.
Interestingly, because his Anbu seniority had grown, compared to last time, he now had permission to see more content.
Several new sealing technique names appeared in the catalog, making his spirits lift.
"Sealing Technique: Adamantine Sealing Chains", "Sealing Technique: Four Symbols Seal", "Contract Seal: Modified"...
'Adamantine Sealing Chains! That's a powerful Uzumaki clan sealing technique used to suppress tailed beasts!'
'And the Four Symbols Seal is one of the core techniques Namikaze Minato used when sealing the Nine Tails!'
Sora felt a surge of excitement.
He forcefully suppressed the impulse to exchange immediately and carefully read the notes below and the required Anbu merit points.
The price was naturally extremely high. Just one of them would consume most of the Anbu merit points he had accumulated over the years.
'Anbu merit points can be earned again, but this high level sealing knowledge is a rare opportunity not to be missed.'
Sora hesitated only for a moment before making his decision. It was the Four Symbols Seal!
Compared to Adamantine Sealing Chains, the Four Symbols Seal was clearly more suitable as the technique Namikaze Minato would have chosen to seal the Dragon Vein.
Although Adamantine Sealing Chains is powerful, its core lies in using materialized chains of chakra to bind the target, leaning more towards "suppression" and "restraint". It is highly effective against physical targets like tailed beasts.
But the Dragon Vein's energy is formless and violent, requiring precise "sealing" rather than simple "restraint"!
The Four Symbols Seal is different. It is known for stability and precision. The fact that Namikaze Minato could use it to split the Nine Tails' chakra and seal it inside Naruto is enough to show its control over violent energy, making it clearly more suitable for sealing the Dragon Vein.
Having inferred which sealing technique Namikaze Minato likely used, Sora pointed to the "Four Symbols Seal" on the catalog and said,
"Exchange for this one."
Suzuka looked up at Sora, seeming somewhat surprised he would choose such an expensive and profound scroll, but didn't ask further, just confirmed formally.
"Exchange 'Four Symbols Seal', deduct corresponding Anbu merit points. Loan period one month. You know the rules."
"Understood."
Sora nodded, watched Suzuka process the procedures, his heart filled with anticipation.
After obtaining the Four Symbols Seal scroll, Sora carefully stored them away and turned to leave the ninjutsu repository.
…
Orphanage.
Back in his room, Sora eagerly spread the "Four Symbols Seal" scroll on the table.
Unrolling the scroll, the beginning contained complex diagrams of the four symbols' trigram positions and the circulation paths of chakra within the sealing formula.
The sealing formula structures and energy circulation principles involved were several times more profound than those in the basic scroll.
'Indeed not simple... Just understanding these basic structures will require considerable time.'
Sora did not rush for quick results. He took a deep breath and performed the Multiple Shadow Clone Technique again.
Five shadow clones appeared. Three were responsible for studying the theoretical part of the Four Symbols Seal, attempting to understand its core essence. The other two continued practicing fine chakra control, laying the groundwork for later construction of complex sealing formulas.
And Sora's main body, combining with the Super Strength training he had just started, immersed his mind in the more refined perception and control of chakra.
'Control, precision, efficiency... This is the common language of powerful strength.'
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