"The simplest and safest method is to master a powerful S-class ninjutsu," Seiki analyzed. "Ordinary people might treat an S-class technique as a last resort, but Naruto is different. Even I'm amazed by his chakra reserves. Once he learns a powerful technique, he can quickly turn it into his own power."
After hearing Seiki's words, the other four stood there dumbfounded.
The simplest method is to learn an S-class ninjutsu? Senior, do you have a misunderstanding about the definition of 'simple'?
Yamato gave a strained smile. "Senior Seiki, isn't this a bit too difficult? Even many jonin don't know Ultimate-level techniques!"
"If you start off by thinking you're just ordinary shinobi, then there's no need to think about getting stronger quickly, because this was never something ordinary people could achieve!"
Seiki spoke solemnly, "From Naruto's urgency, you must be facing extremely powerful enemies, right?"
Yamato nodded with concern. An enemy strong enough to kill even Jiraiya-sama... they were suffocatingly powerful.
"To create miracles, you must first believe in miracles!" Seiki's serious gaze swept over them all. "If you deny yourself from the start, leave being a hero for someone else!"
Naruto excitedly raised his arm. "Big brother Seiki, I definitely can do this!"
"Good, that's exactly the kind of confidence you need!" Seiki approvingly nodded. "Next step is choosing your field. Everyone has their own specialty. Choosing the right direction is the first step toward success!"
At this point, Naruto suddenly realized something.
Wasn't his talent precisely in Shadow Clones and making Rasengan? Using clones to accelerate training, while continuously developing Rasengan further!
"I get it now — [Wind Release: Rasenshuriken]! If I can raise [Wind Release: Rasenshuriken]'s completion rate to 100%, my first S-class technique will succeed!"
Seeing Naruto so excited, Yamato quickly poured some cold water on him. "Don't forget, that technique was classified as kinjutsu by Tsunade-sama!"
Seiki asked with great interest, "Oh? Was it listed as forbidden by the sensei from your world?"
Naruto rubbed the back of his neck nervously. "I added Wind Nature Chakra properties to Rasengan, but since its completion rate wasn't high enough, I couldn't throw it like originally planned. And using it in close combat seriously injures my own arms, so Lady Tsunade labeled it as forbidden."
"Adding property transformation to Rasengan whose form transformation has reached perfection — this isn't an easy task at all," Seiki murmured. "Why don't you demonstrate it for me first?"
"Won't that be too dangerous?" Yamato worried.
"As long as the scale is controlled properly, there won't be any problem," Seiki reassured him. "Besides, aren't I here anyway?"
Yamato thought again. Thinking back, during the fight with Kakuzu, Naruto had successfully used his new technique three times in a row. Controlling its scale for a demonstration now shouldn't pose any significant risks.
Seeing Yamato no longer objecting, Naruto created two Shadow Clones and eagerly said, "Then I'll begin."
In an instant, powerful chakra gathered in Naruto's hands.
The shuriken-shaped Rasengan spun rapidly, emitting an ear-splitting screech that disturbed the surrounding air currents, forming a small whirlwind.
At that moment, Seiki suddenly said, "Naruto, don't resist."
A brilliant flash of light shot into Naruto's body.
Sakura and Sai looked slightly confused. "Did something just fly into Naruto just now?" Sakura asked.
"It's the Spirit Transformation Technique," Yamato exclaimed in awe. "In our timeline, only Dan Kato mastered this S-ranked jutsu!"
"This is already the third one, right?" Sakura muttered to herself.
The Flying Thunder God Technique, the sun-like technique, and now the Spirit Transformation Technique—in just three S-ranked techniques demonstrated by her senior, she finally understood why Senior Seiki had said the simplest solution was to learn an S-ranked jutsu.
For someone as gifted as Senior Seiki, mastering S-ranked techniques must feel as natural as eating or drinking water!
At this moment, Seiki, having taken over Naruto's body, began his free-riding.
As a master of free-riding, he always avoided inventing techniques from scratch when he could simply build upon others' work instead.
Take Wood Release, for example: with a ready-made answer to copy, he developed it within mere months. Ice Release, on the other hand, which he built from scratch, cost him over a year.
Moreover, one shouldn't underestimate the difficulty of advancing from the Rasengan to Wind Release: Rasenshuriken. According to Kakashi, even Minato Namikaze hadn't managed to achieve it.
While part of the issue was the Rasenshuriken's long charge time and heavy chakra cost—making it clash with the Flying Thunder God—the fact remains that developing it was extremely difficult.
Accurately speaking, such matters depend on talent and aptitude. Naruto had invested all his talent into mastering the Rasengan.
As for Seiki, his talent lay in learning and innovating—not merely learning from others, but building upon their foundations to create something new.
In some ways, his versions were even stronger than the originals. Of course, achieving this required countless contributors offering their selfless efforts first.
Exactly because he relied on so many contributors, Seiki was able to fully unleash his potential, allowing him to attain such power at his age.
Especially after learning the Spirit Transformation Technique, his learning efficiency had greatly increased, evolving from basic verbal instruction to immersive hands-on training.
Right now, through Naruto's eyes, Seiki was dissecting every secret behind Wind Release: Rasenshuriken.
"Proportion, coordination, variation, points of convergence… Yeah, I think I've got it now."
As someone who had been spinning Rasengans for nearly seven years—even longer than the current Naruto—Seiki, the so-called 'originator,' naturally saw no more mysteries left in this S-ranked technique once he understood its core mechanics.
Then, *Naruto*—possessed by Seiki—pushed the shuriken forward toward him.
At the exact moment the shuriken erupted, Seiki redirected the attack.
Boom!
Simultaneously, a shockwave exploded far away, and part of Seiki's soul returned into his own body.
"Eh? My right hand is fine!" Naruto excitedly felt his right arm.
Seiki chuckled. "After all, I was the one who asked you to demonstrate, so it would be a shame if you ended up getting hurt."
"Can the Spirit Transformation Technique actually be used like that?" Yamato said in astonishment. If Dan Kato had been able to split his soul as well, he wouldn't have been assassinated while using this technique.
"I merely made a few small improvements to the Spirit Transformation Technique," Seiki said, gesturing with his fingers.
As Yamato was about to make a sarcastic remark about finger-level shinobi skills, his eyes suddenly widened and he looked just like a fish gasping for air. He stared at the miniature Wind Release: Rasenshuriken forming between Seiki's fingers, stuttering, "Wh-What is this?"
Yamato, who had supervised Naruto's training, naturally knew just how much effort the boy had poured into mastering this jutsu. Yet this person had grasped it in just a few breaths—his talent was terrifyingly strong.
He couldn't help but think—if anyone could be called the true Copy Ninja, it was probably Seiki rather than Kakashi!
"Naruto had developed an S-ranked ninjutsu—and this guy learned it that fast!" Sakura gasped in disbelief. Kakashi had already seemed like an unfathomable genius to her for creating an Ultimate Art at the age of twelve. But compared to Senpai Seiki, he appeared to be on an entirely different level.
"Don't be surprised. My strength is in learning. Compared to Naruto, I'm not really good at creating new techniques," Seiki humbly replied.
Yamato's lips twitched slightly. Sure, and I'm the Hokage.
Might've bought it too... if I hadn't seen you use Ice Release with my own eyes.
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