Niten Ichi-ryū and the Secret Sword: Swallow Reversal - Winged Pair

"Kaori, your movements need to be swifter. The essence of the Fire Form lies in continuous, high-speed strikes."

Uchiha Iori said this to Uzuki Kaori while parrying a sword strike aimed at him.

"Also, study the sword manual I gave you more closely; the Void Form is the true ultimate technique."

The sword manual Uchiha Iori provided was obtained from the Sword Demon Miyamoto Iori Sadatsugu.

One night, while they were drinking together in the Hall of Heroes, Miyamoto Iori Sadatsugu raised his cup halfway through and suddenly proposed a duel.

After being struck down by Swallow Reversal three times in a row, Uchiha Iori grew embarrassed and angry, resorting to his Susanoo.

He recalled the scene from that time.

"Do you still wish to fight?" Miyamoto Iori Sadatsugu's voice was as calm as water, yet his eyes were sharp as blades. "I have already grasped your swordsmanship; you have no chance of victory."

Uchiha Iori, feeling a mix of shame and anger, flushed red and said, "Again. This time, I will use my full strength."

"Very well. Niten Ichi-ryū, Banri Ikku. Miyamoto Iori Sadatsugu, please offer your guidance." Miyamoto Iori Sadatsugu said calmly as he assumed his stance.

"My Style, Uchiha Iori. Please offer your guidance." Uchiha Iori took a deep breath to steady his mind and activated his Mangekyō Sharingan.

"Void Form: Iai." Miyamoto Iori Sadatsugu sheathed his blade. With a flash of Iai, countless sword auras descended like a violent storm.

"Taste my great Susanoo! Die!" Uchiha Iori wore a brazen grin as the massive giant rose from the ground.

Miyamoto Iori Sadatsugu's sword auras struck the armor of the Susanoo, failing to pierce the defense or cause damage, merely sparking against the surface.

"A technique I have never seen before. It resembles the Gozu Tennō summoned by Ushi Gozen." Miyamoto Iori Sadatsugu's tone was surprised, but his expression remained calm.

It was not that he had never fought giant enemies, but the sheer scale of this giant was truly immense.

"Without Takeru's Yamata no Dotō and Ame no Murakumo this time, let's see how you fight!" Uchiha Iori was excited; he could finally regain his pride.

Six swords swung in succession, whipping up a gale and carving deep ravines into the earth as they struck.

Miyamoto Iori Sadatsugu was agile; he followed the flow of the air currents, continuously dodging the Susanoo's strikes like a nimble swallow dancing in the wind.

"That is not necessarily true. Sword Art: Shukuchi." Miyamoto Iori Sadatsugu flashed forward, running up the arm of the Susanoo with the speed of lightning.

Seeing this, Uchiha Iori shook the Susanoo, attempting to throw Miyamoto Iori Sadatsugu off.

Miyamoto Iori Sadatsugu leaped, bringing himself to the same level as Uchiha Iori, his eyes filled with killing intent.

"Secret Sword: Swallow Reversal - Winged Pair." Uchiha Iori felt the world go dark; six sword lights appeared before him in the same instant, as if time itself had frozen.

This was a peerless sword technique born from the fusion of the Ganryū's ultimate Swallow Reversal and the strengths of the Niten Ichi-ryū—a secret sword that did not exist in orthodox history.

Facing this terrifying swordsmanship capable of causing multi-dimensional distortion, even the defense of the Susanoo could not hold.

The sword light pierced through the Susanoo and struck directly toward Uchiha Iori.

Poof. Uchiha Iori transformed into a cloud of smoke.

"What!" For the first time, Miyamoto Iori Sadatsugu showed a look of surprise, his heart sinking.

The Uchiha Iori inside the Susanoo was merely a Shadow Clone; his true body had long since vanished.

"Gáe Bolg." From a blind spot, Uchiha Iori unleashed his Noble Phantasm, thrusting his spear toward Miyamoto Iori Sadatsugu.

Miyamoto Iori Sadatsugu was pierced through the heart by the spear from behind. A sharp pain surged through his entire body, and his sword slipped from his hand, falling to the ground.

Uchiha Iori smiled and said, "This time, I am the stronger one."

"I have lost. I am satisfied." Miyamoto Iori Sadatsugu curled the corners of his lips.

"It seems I have made another friend through the sword this time." He closed his eyes in contentment.

After it ended, the essence of the Niten Ichi-ryū and the Ganryū held by Miyamoto Iori Sadatsugu flowed into Uchiha Iori's mind.

He organized these memories into a manual and gave it to Uzuki Kaori, hoping she could learn some of the core principles.

After several days of personal instruction, Uzuki Kaori's swordsmanship improved significantly, and she mastered three of the five forms: Earth, Water, and Fire.

Iori hoped she would master the Niten Ichi-ryū and become a Kage-level powerhouse.

Iori also gave a copy of the notes to Gekko Nobuhiko, in return for his past guidance and protection.

Iori was never stingy when it came to his benefactors and friends.

He sincerely hoped that his friends could live well.

As his thoughts returned to the present, Iori decided to demonstrate the ultimate technique of the Niten Ichi-ryū to give Uzuki Kaori a concrete goal to strive for.

Uchiha Iori dropped the sword in his hand and projected two wooden swords, one long and one short.

He said to Uzuki Kaori, "Kaori, watch closely. This is the ultimate technique of the Niten Ichi-ryū: Void Form: Iai."

"Yes." Uzuki Kaori replied solemnly, focusing all her attention on Iori's blade.

Uzuki Kaori sheathed her short blade and assumed the stance of the Earth Form.

"Void Form: Iai." Iori sheathed his blade. With a flash of Iai, countless sword auras flew toward Uzuki Kaori.

Uzuki Kaori swung her sword, creating a defense as impenetrable as a wall, yet she still could not block the strikes.

"There are only two ways to defend against this move: one is to dodge, and the other is to have defense high enough that it cannot be broken," Iori said to her.

Iori's sword aura merely grazed her body, failing to inflict even the slightest injury; such swordsmanship could already be called divine, turning the mundane into the miraculous.

With the Uchiha Style and Konoha Style as his foundation, having absorbed the characteristics of the Emiya Style swordsmanship and Ancient Irish Swordsmanship, and finally fusing the essence of the Niten Ichi-ryū and the Ganryū, Uchiha Iori's swordsmanship was now no less than that of the sword saints of the Type-Moon world.

"Truly terrifying swordsmanship. The continuous, relentless attacks come at me like a tidal wave, leaving me with no way to parry."

Uzuki Kaori sighed at the sharpness and power of Iori's swordsmanship.

"Your control is nothing short of peak perfection. Despite such dense attacks, every single one grazed past me without a single strike landing on my body."

"This is the foundation of swordsmanship. Those who cannot control their own blades are merely slaves to the sword."

Iori looked at her with a serious expression.

"Lord Iori, Lord Jiraiya has a matter to discuss with you." A ninja appeared beside Iori via Body Flicker, kneeling on one knee to deliver the message.

"Understood, I will go at once." Iori nodded at him, and the ninja departed.

"Then Kaori, I shall take my leave. Continue your practice."

"Very well." Uzuki Kaori picked up her dual blades once more, preparing to continue her training.

Iori then departed via Body Flicker, heading toward the command tent.

The five major forms of Niten Ichi-ryū: the defensive one-sword Earth Form, the crowd-control two-sword Water Form, the one-sword Wind Form that incorporates magecraft for exorcism, the aggressive two-sword Fire Form, and the ultimate technique of Niten Ichi-ryū, the god-speed iaijutsu Void Form.

Secret Sword: Swallow Reversal

A lethal sword technique that strikes from three directions "simultaneously" to cleave the opponent and take their head. Strictly speaking, this is neither a Noble Phantasm nor a phenomenon borrowed from the power of magecraft. It was originally a technique developed to strike down a swallow in mid-flight.

By flashing from the real world and then overlapping two flashes that ignore the concepts of time and space to occur at the exact same moment, it creates strikes from three directions. It is a "Multi-Dimensional Refraction Phenomenon (Kischur Zelretch)" that transcends elements like speed, precision, and feints. Though limited, it reaches the high realm of the "Second Magic."

Secret Sword: Swallow Reversal - Winged Pair

A secret sword technique of the two-sword style, created by gathering the strengths of the "Niten Ichi-ryū" and the "Ganryū," utilizing dual blades to unleash six strikes simultaneously.