...
The students who had not yet entered ["Zanjutsu"] training couldn't help but look over at the teacher's words.
Almost all of them.
"Zanjutsu" was no simple training.
Most Shinigami had to train for years to master it.
They had just received their Zanpakutō, and success was not easy.
"I've already overestimated you, but the reality is even more surprising." The teacher smiled. "What is the name of your Zanpakutō?"
"Kyūbi." Naruto answered.
The teacher turned to the others, instructing, "You all self-study, I'll take Naruto out for a bit."
Someone brave enough raised their hand, "Teacher, we also want to see Naruto's Shikai release."
"Keep training diligently!" The teacher flatly refused, "This is no child's play."
He didn't give the students a chance to continue pleading, leading Naruto out.
...
In the gymnasium.
Headmaster Hogei Ichiji was also summoned.
There were also some Shinigami responsible for recording, verifying, and evaluating.
The way things looked...
It was not just a simple observation.
"Naruto, don't be nervous." The teacher comforted him, "As I said before, mastering Shikai is enough to graduate."
"Headmaster Hogei and the other faculty members are here to confirm and record this matter."
"Just display it normally."
Uzumaki Naruto took a deep breath, grasping the sword hilt and drawing it out.
The dark red color was deep yet dazzling.
He solemnly recited the incantation in his mind.
As the spiritual energy surged and rolled, the Nine Tailed Fox, sealed within his body could feel the changes brought by this new world.
A power fundamentally different from "Chakra" within him had been awakened.
To the extent that...
The very substance of his body no longer seemed to be Chakra.
Naruto's voice appeared in its ear.
"Fury, pain, fear, corruption..."
"Howl and Bloom forth!"
"Kyūbi!"
A massive, crimson, and heavy spiritual pressure emanated from Naruto as the center.
The Shinigami responsible for the evaluation couldn't help but step back, "This is Shikai?"
"What kind of release incantation is this?"
The intensity of the spiritual pressure was still within their expectations.
After all, he was a "5th Rank," stronger than many present. Shikai would naturally enhance his spiritual power.
But what about this sword?
It gave them an ominous and dangerous feeling.
Even their emotions were affected by this spiritual pressure, becoming somewhat depressed and fatigued within their bodies.
Naruto's outward appearance did not change much.
His entire body was shrouded in a layer of dark red, lava-like translucent spiritual energy, with two ear-like spiritual energy protrusions standing tall on his head, and a thick, swinging spiritual energy tail like a fox.
His once vibrant blue eyes had turned crimson, the pupils narrowed into slits, just like a fox.
"Naruto, does your Zanpakutō have any special abilities?" Hogei Ichiji inquired.
Naruto swung his wrist, the blade moving accordingly, "It enhances my body and spiritual power, but as for anything else, I don't think there's more."
Hogei Ichiji nodded, "A Zanpakutō that enhances the wielder's physical abilities?"
That was quite suitable for Naruto.
His talents in "Kidō" were far inferior to his talents in "Hakuda and Zanjutsu."
Naruto felt the power within him.
He realized that what was revealed so far was just the tip of the iceberg, "Headmaster Hogei, I think I can become even stronger."
"Become even stronger?" Hogei Ichiji didn't understand Naruto's meaning.
He even found the words a little frightening.
What did he mean by becoming even stronger?
Stronger than "Shikai"? That would be "Bankai."
Even if one's spiritual pressure met the requirements for a Captain, to learn Bankai would still take hundreds of years.
Accomplished in one go?
He had just mastered Shikai.
Impossible, right...?
Naruto took a deep breath, mobilizing the power of the Nine Tailed Fox within him.
The spiritual pressure intensified further.
A second tail appeared on the spiritual energy cloak.
The streamers attached to the Zanpakutō hilt also split and extended into a second fluffy tail.
"Oh... a second form?" Hogei Ichiji let out a sigh of relief, so that's what it was.
One of the nearby Shinigami muttered, "Nine Tails... Nine..."
"Could it be that Naruto's Zanpakutō can release up to nine tails?"
It wasn't difficult to make such a guess based on the literal meaning.
Naruto nodded, "It seems to be that way, shall I try?"
Hogei Ichiji quickly stopped him, "Wait."
"First, confirm whether your body can bear it."
He had lived for many years and had never seen a Zanpakutō that could change forms and increase power after Shikai, but without reaching Bankai.
Of course, the abilities of "Zanpakutō" were diverse, so having such an anomaly was not surprising.
But he knew well.
Power often comes with a price.
Since the initial Shikai only had one tail, it meant that this current level of power was the most suitable for Naruto. Going any further might require him to pay something.
Naruto obediently nodded.
He checked his body, shaking his head after a while, "I don't feel any discomfort."
"Just a bit of excitement, an urge to fight someone."
Excitement... Impulse...
For battle, these were not negative factors, but could even be considered very positive states.
And among the Gotei 13, there were quite a few of these "battle-crazed" types.
Constantly in an extreme state of "excitement" and "impulse."
It couldn't be considered a price.
"Then continue trying." Hogei Ichiji spoke softly.
Naruto nodded, letting out a light cry.
The third tail lashed out.
The sword hilt also split into a third fluffy streamer.
The changes were subtle. The spiritual energy cloak covering him became denser, no longer as translucent.
The spiritual pressure fluctuations grew more violent.
Causing the observing Shinigami to unconsciously retreat further.
"This Zanpakutō... is truly powerful." One commented.
This oppressive feeling was only experienced in the presence of veteran Vice-Captains.
A novice Shinigami student, with spiritual pressure of this caliber.
Truly remarkable.
"How do you feel now?" Hogei Ichiji asked again.
Naruto focused, "About the same as before, just a bit more excitement."
There was a buzzing in his ears.
Like a chaotic, blended, indistinct roar.
Urging him to draw his sword and slash at anything around him.
His body also had this instinctive impulse.
But he could still suppress it.
"No problem with your body?" Hogei Ichiji asked with concern.
Naruto shook his head, "No burden."
"Then continue trying."
The moment those words were spoken.
The fourth tail unfurled.
The spiritual energy cloak enveloping Naruto underwent a massive transformation, from a semi-transparent dark red to a completely opaque deep crimson.
As if... the spiritual energy had come alive, swallowing Naruto.
That ominous and dangerous feeling became even more intense.
The onlookers were horrified, their backs tingling.
Before their eyes.
Naruto lifted the Zanpakutō, adorned with four streamers, and swallowed it.
The spiritual pressure became even more formidable.
Then his posture changed, no longer standing upright like a human, but crouching on all fours, like a wild beast.
His eyes were devoid of pupils, only two gleaming white circles.
Hogei Ichiji's heart sank, feeling a bad premonition.
"Naruto?" He called out tentatively.
But the response he received...
Was the roar of the "swallowed" spiritual energy monster.
Immediately, an explosion of sound reverberated, and it vanished from the spot.
"Be careful, Naruto lost control!" Hogei Ichiji shouted the warning.
He recalled the emotions that had affected him earlier. Remembered Naruto's mention of "excitement", as he had initially predicted.
This Zanpakutō, with the release of the "Tails" would require a price.
Only, the price was not spiritual power or physical condition, but "Sanity."
The words had barely left his mouth.
The Tailed Beast Naruto had already pounced on a Shinigami, swiping his claws and whipping up a fierce wind.
Boom!
The Shinigami had indeed hastily abandoned his incantation, using ["Bakudō #8: Seki"] {Repulse} condensing spiritual energy into a shield to absorb most of the damage. But even the residual force still sent him flying, firmly embedding him into the wall.
"Naruto's speed is this fast?" One Shinigami was startled, "And his strength this great?"
He remembered Naruto's Shunpo was not at this level.
The trapped Shinigami in the wall was disheveled, head bleeding.
"That Zanpakutō seems to enhance his body in all aspects, not just spiritual pressure, but also strength and speed." Hogei Ichiji frowned, "Restrain him first."
"Be careful not to let him sustain too severe injuries."
...