Once inside, Arata spoke calmly, "The secret technique I am passing on to you is the ultimate hidden art of Kumogakure....the Thunder Release Armor, also known as Lightning God Armor."
"This is the Raikage lineage's signature technique. The Second, Third, and Fourth Raikages all relied on it to ascend to Kage-level power."
"However, mastering it is extremely difficult. It requires innate lightning chakra, exceptional chakra control, and unyielding willpower."
"But here, within my illusion world, you need not fear physical injury. As long as you endure the pain, you will surely succeed."
Hearing Arata's reassurance, Sasuke tightened his lips and nodded firmly. Since he had already made his decision, he would not regret it.
Moreover, his master had gone to great lengths to teach him....he would never disappoint those expectations.
Soon after, Arata began instructing Sasuke in the first stage of Thunder Release Armor training.
Already thoroughly familiar with the initial phase, Arata guided Sasuke carefully within the illusion.
Even if errors occurred, they would only cause temporary suffering, without any real bodily harm.
As for the later stages, Arata was not in a hurry. The first phase focused on continuously stimulating and strengthening the body.
With Sasuke's age, it would already be remarkable if he mastered this before graduation.
By then, Arata himself would likely have fully deciphered the remaining stages by copying and reverse-analyzing the Raikage's complete Thunder Release Armor.
Thus, over the next month within the illusion world, Sasuke's screams echoed endlessly.
Fortunately, Mikoto never learned of this. If she had, she would surely have beaten Arata senseless....though he would never dare fight back.
At the beginning, Sasuke struggled to even channel lightning chakra, let alone control it. Each failed attempt left him grimacing in pain.
Meanwhile, Arata, utterly merciless, produced a thin metal rod infused with lightning chakra.
Whenever Sasuke's chakra deviated, Arata would promptly strike him with the rod, sending violent currents coursing through his body and making him convulse uncontrollably.
Cruel as it seemed, the method proved extraordinarily effective.
Sasuke's chakra control improved at an astonishing pace....from constant errors, to frequent mistakes, then occasional missteps. His progress became clearly visible.
And with every scream, his path toward true strength grew firmer.
Just as Uchiha Arata accompanied Sasuke in training within the illusion world for nearly a full month, after enduring almost a month of relentless torment from Arata, Uchiha Sasuke finally managed to smoothly control his chakra, no longer making mistakes during practice.
At this point, he had basically completed the first stage of cultivating the Thunder Release Armor.
The next step would be to practice in reality, continuously stimulating and tempering his physical body, allowing it to grow stronger at a rapid pace while also enhancing his reaction speed.
The reason why the Fourth Hokage was so powerful lay in his Flying Thunder God Technique and his astonishing reaction speed.
The perfect combination of these two abilities created the legendary Fourth Hokage.
Do not underestimate the difficulty of mastering the first stage of Thunder Release Armor in just one month.
One must understand that during this entire period, both Uchiha Arata and Sasuke trained tirelessly, almost without rest.
Moreover, because they were within an illusion, they could practice without restraint, free from the fear of mistakes, bodily injury, or even death.
At Sasuke's side stood Arata, constantly gripping a metal rod and staring at him intently, keeping Sasuke in a perpetual state of mental tension.
Additionally, Sasuke's own talent was already outstanding, which allowed him to complete the first stage of Thunder Release Armor training within a single month.
In truth, for an ordinary ninja, merely mastering the first stage of Thunder Release Armor would be enough to benefit them for a lifetime.
As long as they continued to temper their body, reaching jōnin level would be more than achievable....especially becoming a jōnin with extraordinary speed and reaction ability.
Such a ninja, unless surrounded or courting death, would possess astonishing survival capabilities.
Three days before the end of the training period, after Sasuke once again successfully executed Thunder Release Armor, Uchiha Arata looked at him as he opened his eyes and asked, "How does it feel? Have you completely mastered this secret technique?"
Sasuke stood up, faint arcs of lightning still flickering across his body. Confidence shone in his eyes as he replied, "Yes, Sensei. I have completely mastered it and haven't made a single mistake in ten consecutive attempts."
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