Sasuke's mind rapidly eliminated one possibility after another, but they all led to a dead end.
'Within the Uchiha Clan, aside from Father, the clan head, I really couldn't think of a second person with the Pupil Power to control this demon fox. But Father had no reason to do so.'
Just as he was lost in thought, the giant demon fox behind the gate, its golden vertical pupils, flashed with a hint of cunning.
"Want to know who that person is, brat?"
The Kyubi's voice carried a tempting tone. Its massive body slowly moved behind the bars, "It's simple. Just open this damned door, and I'll tell you."
It grinned, revealing menacing sharp teeth, "Release me, and not only will I tell you that guy's name, I can also give you even greater power… power enough for you to take revenge on anyone!"
However, as soon as the words fell, the Kyubi itself scoffed first, its tone filled with undisguised contempt.
"I almost forgot. You can't do it at all."
It lazily withdrew its head, its massive body lying back down in the darkness, "This seal was set by the Yondaime Hokage using his life… the Four Symbols Seal. It's one of the top Sealing Techniques in this world."
"Only that brat has the qualification to touch it. As for you, save your energy."
Faced with the Kyubi's instigation and ridicule, Sasuke's expression remained completely unmoved.
Of course, he had seen through the Kyubi's laughable trick. It simply wanted to use Sasuke's arrogance to destroy the seal so it could have a chance to escape.
'A beast locked in a cage could only employ tricks of this level.'
'But only that idiot can do it?'
Sasuke inwardly sneered, 'If even that fool has the qualification to touch it, how could I, Uchiha Sasuke, be shut out?'
He stepped forward, ignoring the Kyubi's mockery, and walked straight up to the massive barred gate.
He reached out and gently touched the faintly glowing seal on the door. The complex and profound pattern of the technique flowed within his three-tomoe Sharingan.
Sasuke had indeed never come across Sealing Techniques before, and they seemed much more complicated than Ninjutsu.
But with his Sharingan, Sasuke discovered something else.
He keenly sensed that this seal wasn't just for imprisonment.
This seal seemed to be able to continuously convert the Chakra leaked by Kyubi into Naruto's own Chakra...
'No wonder the Chakra in that idiot's body is so huge.' Sasuke understood, 'The Yondaime Hokage was truly an incredible guy.'
"What, dumbfounded?"
Seeing Sasuke silent for so long, the Kyubi's gloating laughter sounded again, "Give up, brat. This isn't something you can understand just by looking with those eyes…"
But then, Kyubi's voice stopped abruptly.
Because Sasuke slowly withdrew his hand and instead grasped the hilt of the sword at his waist.
His left hand held the scabbard, his right hand rested on the hilt. His dark eyes calmly watched the seal before him.
The corner of Sasuke's mouth curled into a barely perceptible cold smile.
'I know what you're thinking. You just want to use my hand to escape, then devour both me and Naruto.'
'But you seem to have gotten one thing wrong.'
'Even if I let you out, it would just be exchanging a small cage for a larger one.'
Sasuke was absolutely confident he could subdue the escaped demon fox again.
Thinking this, he slowly drew his Zanpakuto from its scabbard. The blade traced a cold trajectory in the gloomy space.
He released his hand. The Zanpakuto hovered in front of him. His entire aura became sharp and solemn in that instant. A pure Reiatsu erupted violently!
He raised his eyes. Deep within his pitch-black pupils, it was as if lightning was brewing.
A low chant resounded throughout the sealing space.
"Carve the thunder, become the blade, Takemikazuchi!" (Raimei wo kizami, yaiba to nase, Takemikazuchi.)
Boom!!!
The moment the words fell, violent black lightning arcs erupted from the blade, accompanied by deafening thunder, illuminating the entire dark underground waterway with flickering light!
That terrifying Reiatsu even made the Kyubi's massive body instinctively tense up.
However, this violent scene only lasted for a moment.
Sasuke reached out and grasped the hovering 'Takemikazuchi'.
Bzzt…
A soft sound rang, and all the released black lightning arcs were instantly sucked back into the blade, forming dense thundercloud patterns. The thunder also vanished.
The form of the Zanpakuto didn't change drastically… only the blade itself became deeper and more profound.
Only on the slender blade's edge lingered a faint, almost imperceptible black cold light.
All the power was withdrawn to the extreme.
"Then, let me see just how sturdy this cage left by the Yondaime Hokage really is."
Sasuke raised his hand and casually swung the sword.
An invisible slash silently landed on the massive barred gate.
Swoosh…
A slight tearing sound was heard.
On the sealing talisman, a slender crack quietly appeared.
At first, the Kyubi still held a trace of scornful amusement, but when it saw that crack, its expression froze.
The disdain on the Kyubi's face gradually disappeared, replaced by a twisted grin of ecstatic joy.
Sasuke didn't stop. One after another, highly condensed slashes continuously fell upon the seal.
Swoosh! Swoosh!
Cracks spread rapidly like a spider's web.
The power of the seal was being destroyed at a visible speed.
'Yes, that's it! Faster, brat!'
Kyubi roared madly in its heart, "Faster, faster! Chop this damned cage open completely! I'll be out soon!"
Its eyes were fixed on the expanding cracks, already seeing the dawn of freedom.
The seal kept cracking but wasn't completely broken.
Even so, an unprecedented amount of massive Chakra surged out from the cracks like a bursting dam.
The moment Sasuke felt this power, his heart jolted violently.
'I seemed to have underestimated this demon fox's strength. Just the leaked portion already surpassed any Captain-level Shinigami I had ever seen.'
'This power was already beyond my ability to handle now.'
Outside, Training Ground 3.
"Ahhhh…!!!"
Naruto suddenly let out a piercing scream, his whole body curling up on the ground, trembling violently.
A red Chakra, like boiling magma, surged wildly from within him, instantly enveloping him.
His skin began to peel, his nails turned sharp. From his back, three crimson tails made of Chakra violently lashed out, heavily striking the ground.
"Roar…!"
Naruto instantly lost his self-awareness, letting out a beast-like growl from his mouth.
Hokage's Office.
Bang!
Hiruzen's pipe fell heavily onto the desk. He abruptly stood up, staring intently at the crimson figure in the crystal ball.
"This is... the Kyubi's Chakra! How did it suddenly go out of control?!"
"Three tails..."
Kakashi's pupils beside him constricted sharply.
"Not good! The problem lies with Sasuke!"
Kakashi instantly realized, "Just now, Sasuke put his hand on Naruto. He probably made contact with the Kyubi's seal!"
"Quick, issue the highest state of emergency! All Anbu proceed to Training Ground 3 immediately! Control Naruto at all costs!" Hiruzen also reacted, quickly issuing orders.
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