Thunder vs. Light

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Shisui's eyes were filled with a thirst for battle as he stared at Kizaru. In this world, he had yet to truly face a top-tier opponent. This world was brimming with powerful individuals, a system of strength that rivaled the shinobi world. He was eager to test his own abilities here, and a Marine admiral was the perfect target.

"What?!"

"Is he insane? How dare he provoke an admiral?!"

"Does he not know how those Supernovas with over 100 million berry bounties got obliterated?"

Earlier, several Supernovas, each with bounties over a hundred million, had shown off various powerful abilities. But the moment Kizaru got serious, he took them down in an instant. Not one of them stood a chance. This was the power of the World Government's strongest force.

Yet this young Uchiha had the audacity to directly challenge such a force. Sure, Shisui's bounty of 1.1 billion berries was substantial, but it didn't make him a match for an admiral—especially given how young he looked.

Kizaru looked up at Shisui, his expression as nonchalant as ever. "Oh... so you're that Uchiha Shisui from Kitaro's security company." He waved a lazy hand, showing little concern. "It's because you attacked Saint Charlos that I had to step in. Your Uchiha Security Division is getting reckless, isn't it?"

"You attacked Saint Charlos, Kitaro went after Rosward and Shalria. Do you Uchiha have some grudge against the Celestial Dragons?"

"What? Kitaro also attacked the Celestial Dragons?" Shisui and Itachi hadn't heard this yet. With all the cries on the island about the assault on the Celestial Dragons and the arrival of an admiral, Shisui had assumed it was just because of his actions. But now he found out Kitaro had attacked two of them.

Shisui sighed in relief. He didn't want to bring unnecessary trouble to Kitaro. But if Kitaro was already causing problems himself, that was another story.

"Typical Kitaro," Shisui smirked. "We just found their disregard for life intolerable."

"Well then," Kizaru replied coolly. "Since you're the ones who started this, you'll pay the price. After I deal with the two of you, Uchiha Kitaro will lose his right and left hands, and your little security company will be shattered."

With a flash, Kizaru's body transformed into light, appearing right in front of Shisui and Itachi. He raised his leg to kick them, but Shisui and Itachi quickly dodged.

"Fire Style: Great Fireball Jutsu!" Itachi swiftly completed a one-handed seal, releasing a massive fireball from his mouth.

"What?!"

"He can spit out fireballs?"

"Is he a Devil Fruit user too?"

Kizaru lifted a finger, seemingly unconcerned.

Zing—!!

A laser beam shot out, piercing through the fireball and aiming directly at Itachi.

Boom—!

The explosion from the fireball was followed by a secondary blast from Kizaru's laser. As the smoke cleared, Kizaru emerged, though part of his hair had been singed.

This shocked the onlookers. Just moments ago, four Supernovas hadn't been able to scratch him, yet this young Uchiha Itachi had managed to injure him, even if only slightly. For some, Itachi had merely been a shadow behind Uchiha Kitaro, and his 1.5 billion berry bounty seemed like a targeted response by the World Government. Now they realized he was a formidable opponent in his own right, far beyond the Supernovas.

"Impressive," Kizaru commented, touching his singed hair. "You actually embedded Armament Haki into the fireball. Now kids fight this deviously? Scary…"

Kizaru had attempted to phase out with his Logia powers but had been caught off guard when the fireball detonated with embedded Haki, giving him no time to fully evade.

The crowd stared at Itachi in shock. "That kid's done for now," someone whispered. "Taking a direct hit from Kizaru? He's finished."

But as the smoke dispersed, Itachi reappeared, shielded by a glowing orange skeletal ribcage surrounding his body. The ribcage had a faint crack, but it remained intact, clearly protecting him.

"Huh?" Kizaru's face shifted, eyes locking onto the energy skeleton around Itachi. He remembered it well; on Enies Lobby, Uchiha Kitaro had summoned something similar. It had expanded into a massive armored figure that had seized him, leading to injuries that only recently healed. The bone-like structure was the initial form of that same colossal entity.

"So… this power isn't unique to Kitaro…?"

Kizaru's expression turned serious, realizing the potential danger if this ability was Uchiha-wide.

Suddenly, a streak of lightning appeared beside Kizaru, as Shisui materialized from it. Shisui raised his leg and kicked, forcing Kizaru to block hastily.

Boom—!

The impact sent Kizaru crashing into a nearby building.

"What?!"

"No way!"

"Admiral Kizaru… was kicked away!"

People stared in astonishment. The resemblance of Shisui's lightning form to Kizaru's light-based abilities had not gone unnoticed.

"A Logia user, perhaps…" murmured Hawkins, recognizing Shisui's abilities, now certain this was a clash of Logia powers.

---

"You young folks really don't respect your elders these days," Kizaru muttered, reappearing in a flash of light.

"Itachi, you're not yet adept with your Mangekyo Sharingan. Leave this guy to me," Shisui said, eyeing Kizaru intently.

"Understood." Itachi nodded, deactivating his Susanoo with a slight pant. Since unlocking the Mangekyo Sharingan, he had been training intensively under Kitaro's guidance. Only through Kitaro's teaching had he managed to activate Susanoo so quickly; otherwise, without a teacher, even someone as talented as Itachi might have taken months to reach this level.

Itachi's enhanced physical abilities, thanks to breathing techniques, had mitigated some strain, but he still wasn't fully accustomed to Susanoo, which took a significant toll.

The moment Itachi deactivated his Susanoo, Kizaru flashed beside him, ready to strike. Shisui, furious at Kizaru's attempt to target Itachi, unleashed a bolt of lightning that forced Kizaru to phase into light and evade, letting the lightning crash into a nearby building.

"Your opponent is me," Shisui said coldly, his body now enveloped in a fierce blue chakra, crackling with electricity.

This was the Lightning Release Chakra Mode, learned from the Fourth Raikage. After seeing it demonstrated by Kitaro, Shisui had persuaded him to teach it. The Lightning Release Chakra Mode boosted Shisui's speed and strength, further enhanced by his Mangekyo Sharingan's perception.

Then, a lightning-like tattoo appeared on Shisui's forehead—a Demon Slayer-style mark. The mark, triggered when the body temperature reached 39°C and the heart rate exceeded 200 bpm, boosted his physical abilities tremendously. Shisui had awakened it through Kitaro's resonance, and despite the usual life-shortening effects, Shisui's modified ninja physiology minimized the risks.

Kitaro had said that someone would solve that for them in the future so they trusted. Of course the person Kitaro meant was Orochimaru.

---

Crackling with power, Shisui activated the true power of the Thunder Breathing Technique!

With the ground breaking apart under him from sheer power, Shisui launched forward, the ground splintering like a meteor impact beneath his feet.

Shisui's body shot forward, closing the distance between himself and Kizaru in an instant.

"So fast!"

Despite his guard, Kizaru hadn't anticipated Shisui's extraordinary speed and quickly raised his arms to block.

Boom! Boom! Boom!

With a single punch, Shisui sent Kizaru hurtling backward, smashing through multiple buildings.

"What?!"

"Kizaru got sent flying again! So, it wasn't just a fluke before?"

Witnesses who'd earlier seen Kizaru split in two by Apoo's attack had assumed Kizaru was simply caught off guard. But now, Shisui's sheer speed was leaving everyone stunned.

Zing—!

A golden laser beam shot toward Shisui, but he raised a finger and fired a bolt of compressed lightning.

Kaboom—!!!

The golden laser collided with the blue-white lightning, creating a massive explosion that sent spectators sprawling.

"Whoa!"

Kizaru's figure reappeared in mid-air.

"Yasakani no Magatama!"

Crossing his arms, Kizaru unleashed a barrage of blinding, golden light bullets.

Shisui deftly dodged.

Boom! Boom! Boom!

Each beam hit with terrifying force, demolishing the buildings around Shisui. He steadied himself on the branches of a redwood, his arm crackling with lightning as he swung it toward the sky.

"El Thor!"

Crack—!

A massive lightning bolt descended from the heavens, aimed at Kizaru, who was forced to stop his attack and dodge in a flash of light.

Boom—!

The building beneath Kizaru was obliterated by the bolt, reduced to ash.

Watching the battle, Hawkins, Urouge, Drake, and Apoo were all struck with awe.

"Too strong… This is just unbelievable!"

They could accept the admiral's immense power, given the World Government's reputation as the strongest force in the world. But Uchiha Shisui ?

Rumored to be the second-in-command of the Uchiha Security Company, he appeared no older than 15. They'd been cautious upon meeting him, but hadn't expected him to be much stronger than themselves. Now, they were questioning everything.

A bounty of 1.1 billion, was that high? Before, they would've said yes. But now, even 2.1 or 3.1 billion wouldn't seem like an overestimate. A youth able to match one of the World Government's top forces, no—going toe-to-toe with them. Was this the Uchiha Security Company's true strength?

They were starting to see that the world was on the brink of gaining a new superpower to rival the World Government.

---

Whoosh, whoosh!

Kizaru landed on an open field below, gazing up at Shisui, who stood on the branch above.

"This has gotten complicated!"

Initially, Kizaru hadn't thought much of Uchiha Shisui. His real target was Uchiha Kitaro. The last encounter with Kitaro had left Kizaru disgruntled—being injured in his arm and splashed across newspapers worldwide had been a blow to his pride. He had come here to settle that score.

But the supernovas, those rookies, were just incidental targets. Who would've guessed he'd meet resistance from Uchiha Shisui ?

Though Shisui wielded the Rumble-Rumble Fruit, another powerful Logia ability like his own, Kizaru had assumed his own experience would put him a cut above.

Yet, Shisui wasn't merely relying on his Devil Fruit's power. Those lightning patterns across his forehead, the blue energy surrounding him—it didn't seem to be part of the Rumble-Rumble Fruit's capabilities.

Kizaru clenched his right fist, placing his left hand over it as he slowly drew his hands apart.

"Ama no Murakumo Sword!"

In his hands, he formed a dazzling sword of light.

The time for games was over. If he couldn't even handle Shisui, his reputation as Admiral Kizaru would be a joke among pirates.

Seeing Kizaru wield his light sword, Shisui crouched on the branch, gripping his own blade's hilt.

Crackle!

Lightning surged around him, infusing his blade with Rumble-Rumble energy and chakra, forming a blue lightning Blade.

A light Sword vs A Lightning Blade.

Flash—!

Kizaru lunged at Shisui.

"Thunder Breathing, First Form: Thunderclap and Flash!"

Boom!

With a powerful step, Shisui's force left a crater on the giant tree, sending him streaking toward Kizaru.

As they clashed, Shisui unleashed his Lightning blade in an instant.

Clang—!!!

The golden sword and blue lightning blade collided.

Boom—!!!

The impact sent a powerful shockwave outward.

"Ahhh!"

Spectators were blown away by the blast. But the majority stayed put, unwilling to miss such an intense battle.

This was a fight of a lifetime.

Zap! Zing!

Golden light and blue lightning clashed, devastating everything in their wake.

Suddenly, Shisui's lightning blade extended, slicing clean through one of the massive trees.

The enormous trunk began to tilt, then slowly fell to the ground.

---

Shisui decided to go all out.

Shisui smirked. "Then let's see if you can handle this."

Without warning, Shisui's chakra erupted around him, a spiraling wave of blue lightning giving form to a giant Susanoo. Its towering figure was wreathed in crackling electricity, each line of armor blazing with the intensity of a thunderstorm.

This Susanoo was unlike any other—empowered by Amaru. Lightning arced along its blade as it lifted its colossal sword.

Kizaru's gaze narrowed as he raised his arm, particles of light beginning to gather and crystallize around his fingertips, transforming into a pulsating sphere of golden light. "Yasakani no Magatama," he whispered, firing off a barrage of light bullets that hurtled towards the lightning-clad Susanoo with blinding speed.

The Susanoo moved with surprising agility, sweeping its sword through the air and deflecting Kizaru's light projectiles. Each deflected beam sizzled through the air, scorching the surrounding buildings and leaving trails of light. But Kizaru was just getting started. He raised both hands, summoning an even larger orb of golden light, crackling with lethal energy.

Shisui took a deep breath, feeling the rhythm of his heartbeat align with the crackling hum of his lightning. "First Form: Thunderclap and Flash… Godspeed!"

In an instant, Shisui disappeared from within his Susanoo, moving so fast that the Susanoo itself seemed to vanish for a split second. To the untrained eye, it looked as though Shisui had become one with his lightning, a blinding streak that shot toward Kizaru.

Kizaru barely had a second to react. He transformed into light, his body becoming intangible, but Shisui's enhanced senses and sharingan anticipated the move. Shisui's hand erupted in a swirling Chidori, lightning sparking from his arm as he moved straight through Kizaru's light form.

The two of them was so fast that no one was able to even see their shadows.

But Kizaru wasn't finished yet. He grimaced, golden light gathering in his palms as he raised his arms to the sky. "It seems I need to get serious?" His voice boomed as a massive column of light formed above him, blinding and brilliant, brighter than the midday sun. "Sacred Light Burst!"

The light expanded, forming a massive sphere in the sky that descended toward Shisui with terrifying force. Shisui looked up, his sharingan spinning as he braced himself, his Susanoo reforming around him in a protective stance.

The Susanoo's eyes glowed fiercely as Shisui channeled every ounce of power he had, combining the strength of the Amaru-empowered Susanoo and the Lightning Devil Fruit into his next attack. Raising his hand, he gathered an immense bolt of electricity, compressing it until it was a small, blindingly white sphere. With a roar, he thrust his hand forward, releasing the attack in a massive, jagged bolt of lightning aimed directly at Kizaru's incoming light.

The two attacks collided mid-air, creating a cataclysmic explosion. Light and lightning intertwined, twisting and clashing in a violent vortex that illuminated the entire battlefield, as if the heavens themselves had cracked open. The shockwave flattened everything in its radius, a roaring maelstrom of energy that seemed to defy the laws of nature.

Shisui gritted his teeth, feeling the strain of maintaining his Susanoo and channeling so much power at once. The clash continued, each second feeling like an eternity as his lightning and Kizaru's light wrestled for dominance.

Finally, with a blinding flash, the explosion reached its peak, sending both combatants flying backward. Shisui's Susanoo flickered, and he barely managed to land on his feet, breathing heavily, his chakra reserves severely depleted. Across the field, Kizaru was similarly battered, his golden armor cracked and his once-mockingly calm demeanor gone.

They stared at each other, each acknowledging the other's strength with a silent respect.

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