One Piece: Kaido's adopted son, starts with the Eight Gates Formation.

"Kaido?!"

Zhan Guo's pupils trembled violently, and a chill shot from his spine straight to the top of his head!

That madman is here again!

Previously, he had only come because he was "bored" and wanted to "commit suicide".

But this time he understood.

They're definitely here for Lynn the Demon Child!

Rumble—!!!

Before he could figure it out, the entire Marineford began to shake violently!

The sky outside the window was instantly covered by endless dark clouds, turning day into night!

Thick bolts of purple lightning danced wildly in the clouds, tearing the sky apart!

A terrifying pressure, powerful enough to make everything submit, descended from the sky and pressed down firmly on the hearts of every marine!

"All personnel on high alert!!"

"Highest level combat preparation!!"

The piercing alarm and the officers' shrill shouts echoed throughout the entire Naval Headquarters!

Countless naval soldiers rushed onto the square, raised their weapons, and faced the dark sky, their bodies trembling uncontrollably!

Sengoku and Akainu rushed out of the office and looked up.

From within the churning dark clouds, a dragon's head, so enormous it defies description, slowly emerged.

The blue scales shimmered with a cold metallic luster under the lightning.

Those beastly eyes, like burning lava, were filled with endless savagery and rage, and they were fixed on the Marine Headquarters below!

Kaido of the Beasts!

He really came!

"The Warring States Period!!"

A roar like that of a god exploded from the clouds, turning into a terrifying sound wave that swept across the entire Marineford!

"Hand over my son...!"

His voice was filled with an undisguised, overwhelming killing intent to destroy everything!

Akainu's fists clenched so tightly they cracked.

He was already burning with rage because of the humiliation he suffered in Impel Down, and Kaido's arrival gave him a perfect outlet to vent his anger!

"A Yonko dares to storm Marine Headquarters alone?!"

"Seriously... arrogant to the point of courting death!!"

Sengoku's face was grim. He took a step forward and roared at the giant dragon in the sky, "Kaido! This is Marineford! This is not a place where you can run wild!!"

"Get back there right now!!"

"roll?"

A ferocious smile stretched across Kaido's enormous dragon face.

"If you don't hand over my son, I'll raze your entire Navy Headquarters to the ground today!!"

Before the words were even finished!

His enormous dragon mouth suddenly opened wide!

A terrifying energy was gathering wildly in his throat!

"Heat Breath!!"

boom--!!!

A beam of destructive light, powerful enough to instantly vaporize an island, tore through the atmosphere and, carrying terrifying heat capable of incinerating everything, hurtled straight down toward the square of Marineford!

"You bastard!!"

Akainu roared!

"A massive fireball!!"

He soared into the sky, his right arm transforming into an enormous lava fist, fearlessly meeting the destructive dragon breath!

Boom-! ! ! !

Lava and dragon's breath collided violently in mid-air!

An indescribably terrifying explosion occurred in an instant!

The violent energy shockwave, like a Category 12 hurricane, spread wildly in all directions!

The entire Marineford was violently shaken by this impact!

Countless buildings collapsed instantly, turning into ruins!

The sea below was whipped up by towering waves hundreds of meters high!

"I wish I had Kaido's guts..."

In the corner, Garp sighed helplessly.

But next second.

The laziness on his face vanished without a trace, replaced by an unprecedented solemnity.

For justice.

He had no other choice.

He stomped the ground and shot into the air like a cannonball, his iron fist, covered in Armament Haki, slamming down on Kaido's dragon head!

"Now that you're here, you're not leaving, Kaido!!"

"Garp!"

Kaido's dragon eyes narrowed, and he swung his massive dragon tail to meet Garp's iron fist!

Another earth-shattering explosion!

In the sky, three figures representing the world's top combat power were locked in a fierce battle!

Just then.

A golden light flashed.

Kizaru, Borsalino, appeared lazily beside Sengoku, his body wrapped in bandages.

"Wow, that's really scary, it's so intense right from the start."

"Borsalino, is your injury getting better?"

Sengoku immediately inquired about Kizaru's injuries.

"Don't worry, Marshal, I'm not that fragile~"

"But even now, hearing the name 'Demon Child Lynn' still gives me a bit of a headache..."

Kizaru was resting well.

Even if Kaido, one of the Four Emperors, were to invade, there would be a bunch of high-ranking Navy officers in charge, so he wouldn't need to show up in person.

But when he heard Kaido call Lynn's name...

I couldn't help but shudder.

This shows how deep the shadow Lynn cast on him was.

and so.

He decided to come and take a look.

Sengoku asked in a deep voice, "Boltaro, who do you think is more difficult to deal with, Kaido or that brat?"

"In terms of pure strength, the two are about the same. If I were to be hit head-on by Kaido's two strongest blows, I probably wouldn't be able to withstand it."

"In terms of physical defense, they are all the type that are impossible to kill, but... that kid's methods are even more bizarre and baffling."

Kizaru paused, his tone becoming extremely serious.

"but."

"When it comes to dodging and speed..."

"That brat is way ahead of Kaido."

"Even I... can't escape."

The heart of the Warring States period sank suddenly.

Kizaru took a deep breath and gave his final conclusion.

"In summary..."

"That brat is stronger and more dangerous than Kaido."

The lieutenant generals around him gasped in shock upon hearing this conclusion, their faces filled with horror!

A monster even stronger than Kaido?!

Has the world gone mad?!

Just then.

"Kōsai-san-ki: Naraku-sama!!!"

In the sky, Kaido, who was being suppressed by Garp and Akainu, let out a deafening roar!

The spiked club in his hand was wrapped in purplish-black Conqueror's Haki and lightning, and a terrifying aura that was enough to wipe the entire Marineford off the map began to gather wildly!

"not good!"

During the Warring States period, his pupils constricted sharply.

He couldn't wait any longer!

"That bastard! Is he trying to destroy this place?!"

Sengoku suddenly ripped off his marshal's cloak, and golden Buddhist light burst forth from his body!

"Human-Human Fruit, Mythical Zoan Type, Great Buddha Form!"

A colossal golden Buddha statue, reaching to the heavens, appeared in Marineford!

"Kaido! That's enough!!"

The golden Buddha, an incarnation of the Warring States period, unleashed a palm strike with a devastating shockwave, forcefully joining the battle!

Rumble rumble rumble—!!!

Three against one!

Admiral, naval hero, naval commander!

Three figures representing the highest combat power in the navy join forces to besiege a sea emperor!

The battle raged fiercely, leaving the sky and earth in chaos.

Although Kaido was powerful, he eventually fell into a disadvantageous position under the combined attack of the three.

His wounds were multiplying, and his breathing was becoming increasingly labored.

finally.

Under Sengoku's devastating shockwave, Kaido's massive dragon body could no longer withstand the impact and crashed down from the sky, creating a huge crater in the ground.

The smoke and dust cleared.

Kaido reverted to his human form, covered in blood and tightly bound by seastone chains, yet he still glared intently at Sengoku with those murderous eyes.

"Lock him up in Impel Down!"

Panting heavily, Sengoku gave the final order.

……

Impel Down, the underwater prison.

When Magellan and Akainu escorted the legendary "strongest creature in the world," Kaido, to the sixth level of Infinite Hell...

All the prisoners held their breath.

Kaido was dragged along by chains, and with each step, the ground trembled.

He glanced at the expressionless Akainu and Magellan, a bloodthirsty smile creeping onto his lips.

"I'll tell you."

"If you dare to let Lynn lose a single hair."

"Even if I crawl out of hell, I will never let you get away with this."

Akainu, Magellan, and the others all remained silent.

at last.

They arrived in front of a prison cell.

The heavy gate slowly opened.

Kaido raised his head, ready to see just how badly his unfortunate "son" had been tortured.

however.

The scene inside instantly washed away the blood and exhaustion from his face.

Instead, there was an extreme, incomprehensible bewilderment.

It wasn't the damp, dark, blood-stained cell I had imagined.

Instead, it was a rather cozy "single room".

In the center was a huge wooden barrel, steaming hot, with even a few brightly colored flower petals floating on the surface.

Little Lynn was immersed in warm water, with only her little head sticking out, humming an unknown tune contentedly.

On the small table beside him, there was a pile of fresh fruit: bright red watermelons, amethyst grapes, and golden bananas—everything imaginable.

His chubby little hands were holding a slice of watermelon, and he was biting into it, the juice spilling out, with a look of satisfaction on his face.

Kaido was stunned.

He even wondered if he was hallucinating from the beating.

Is this really Impel Down?!

He wasn't treated like this when he was arrested several times before!

Lynn was chewing on watermelon when he saw Kaido at the door and paused for a moment.

Then, his dark eyes lit up instantly, and he happily waved his chubby little hand.

The voice was childish and sweet, yet it exploded in Kaido's ears like a thunderclap.

"ah!"

"Father, you've been arrested too?"