One Piece: The user of the Nen-Nen Fruit, who overturned the sea.

Kaido, carrying the Eight Guardians, stood on the left flank, his heat breath sweeping out a scorched path, temporarily forcing back the surging monsters.

Hawkeye stood on the right wing, and every time Black Blade Night swung, it was a green slash that was a thousand meters long, cleaving swathes of monsters into black mist.

Loki's iron thunderbolts smashed open a space in front of them, and the giant warriors formed a square formation, using their bodies to withstand the monster's charge.

Shanks unleashed his Conqueror's Haki to its fullest extent, and black and red lightning swept across the entire area, shattering all monsters that approached him.

Zoro, Sanji, and Kuina stood back to back at the front line, their swords flashing and flames clashing as they slashed through the onrushing monsters.

Roy watched as the soldiers retreated quickly under the cover of their officers. Although their formation was in disarray, it remained orderly, and there was no large-scale rout.

He withdrew his gaze and focused on the thick black fog at his feet.

The black mist surged from the ground, constantly condensing into new monsters.

The source is below; unless the source is cut off, the monsters will never stop.

Roy took a deep breath.

Inside the chest cavity, a third heart began to pound.

"Thump—!"

The dull thumping of his heartbeat resounded like a war drum, echoing throughout the entire Pangu City.

Roy's heartbeat echoed across the battlefield, each beat deeper and heavier than the last, like the war drums of an ancient behemoth awakening from its slumber.

The heartbeat reverberated from the chest cavity throughout the body, and a dark light surged beneath the skin. With each contraction of the third heart, a thick black mist was pumped into the blood vessels.

"Everyone, retreat to the edge of the Red Line."

Roy's voice descended from mid-air, carrying an undeniable composure.

"Tezzolo, hold the barrier for thirty seconds."

"clear!"

Tesoro gritted his teeth and pushed the output of the Golden Domain to its limit.

Liquid gold surged wildly from the ground, and the golden barrier grew from five meters thick to ten meters, its surface covered with dense spikes that pierced through any monsters that crashed into it.

Despite its numerous cracks, the golden barrier managed to keep the strange tide at bay.

The officers took turns providing cover as the ordinary soldiers retreated.

Kaido walked at the very back of the left flank, his heat breath creating a wall of fire.

Hawkeye walked on the right flank, Black Blade dragging on the ground, its blade energy carving a deep trench in the ground, temporarily forcing the pursuing monsters back.

Loki carried Ironbeak at the very back, the giant's steps heavy and steady.

Each step created a deep pit in the ground, and the monsters that fell into the pits were then finished off and shattered by the giant warriors behind them.

Luffy was about to rush up and fight, but Roy glared at him and stopped him.

"You take the Straw Hat crew and cover the rear; you don't need to fight for this area."

Luffy opened his mouth as if to say something, but when he met Roy's gaze, he swallowed his words.

He turned and ran towards the Straw Hat Pirates, swinging his rubber arm to pull several soldiers surrounded by monsters out of the way.

Thirty seconds later, Tesoro's golden barrier shattered.

The fragments dissipated into countless golden specks in the air. Tesoro slumped to the ground, most of his golden armor shattered, his face covered in sweat.

"Boss... can't hold on any longer..."

Roy nodded.

He ascended to a high altitude directly above Pangu City and looked down at the entire city.

The black monsters densely covered every street, every square, and every rooftop.

New monsters continued to emerge from the cracks, surging through the city like a black tide.

Roy closed his eyes.

The power of the Dark-Dark Fruit surged within him, and his third heart beat wildly, pumping more dark power into his veins with each beat.

The power was heavy, ancient, and carried a violent, all-consuming desire. He no longer suppressed it.

"The Realm of Darkness".

Pure black mist erupted from his body, surging in all directions like a volcanic eruption.

The black mist was as thick as ink, churning and boiling, carrying a suffocating sense of oppression.

It spread out from Roy's feet like a huge black curtain, quickly covering the sky above Pangaea.

Wherever the black mist passed, light was swallowed up, sound was drowned out, and even the air became thick and heavy.

The black-turned monsters on the ground seemed to have been choked by something, and their movements suddenly stopped.

The black mist around them began to surge uncontrollably, as if they had encountered a natural enemy and were frantically trying to escape.

But the Dark Realm is like an impenetrable net, trapping all the black mist inside.

The first monster let out a silent scream.

The black mist on its body was forcibly stripped away by the Dark Domain, drawn out from its torso like silk threads, and merged into the surging black mist around Roy.

Without the support of the black mist, the monster's body quickly dried up and cracked, crumbling into powder like an eight-hundred-year-old dried corpse, which was scattered by the wind.

Then came the second head, the third head, the tenth head, and the hundredth head.

Roy moved slowly above Pangaea, the Dark Realm sweeping across the entire city like a giant black net.

Every time he moved to an area, the monsters in that area would be stripped of their black mist, shattered, and dissipated within seconds.

The black-turned monsters let out silent howls, trying to escape, but the Dark Domain covered the entire Pangu City, leaving them nowhere to run.

Roy could sense that with each monster the black mist devoured, the power of the Dark-Dark Fruit grew stronger.

The black mist originated from Davy Jones's source and shared the same origin as the Dark Fruit.

Devouring them is like gathering back the scattered fragments of Davy Jones' power, bit by bit.

He was using darkness to devour darkness, and with each monster he killed, he reclaimed a wisp of his original essence.

"This feeling..."

Roy said something in a low voice, a strange look flashing in his eyes.

The power of the Dark-Dark Fruit continued to rise within him, like a dry well being refilled with fresh water.

His psychic abilities have expanded, his spiritual perception from the Soul-Soul Fruit has become more acute, and even the flow of his Haki has become much smoother.

Roy continued moving.

From the East District to the West District, from the South City to the North City, from the Royal Palace to the Port.

The Dark Realm, like an invisible giant hand, wiped away the black monsters in the entire Pangu City layer by layer.

In less than half an hour, the densely packed strange tides in the city were completely wiped out.

The last few monsters tried to burrow back into the underground fissures, but were caught up by Roy's Dark Domain.

It was forcibly pulled out from the crack, the black mist was stripped away and swallowed, and the body shattered and dissipated.

The entire Pangu City fell silent.

No more black mist flowed from the crack, and only a thick layer of gray powder remained on the ground, which was the residue left behind after the monster was stripped of the black mist.

Roy slowly landed in the center of the square, and the black mist receded into his body.

His figure emerged from the realm of darkness, his body still enveloped in a faint black mist, like a thin veil.

The Allied soldiers watched him from a distance, completely silent.

No one spoke, but everyone's expression was the same—awe.

That power was beyond their comprehension.

After landing, Roy stretched his wrists.

The power of the Dark-Dark Fruit stabilized within his body, becoming significantly stronger than before.

He could sense that the swallowed black mist had completely merged with the Dark Fruit, and he had retrieved most of the fragments of Davy Jones's origin.

Telekinesis, the Soul-Soul Fruit, Haki—all his abilities have increased dramatically.

He looked down at the largest crack at his feet.

Deep within the crack, a dark passage leads to the underground, where an even denser aura of darkness lurks.

It was older, thicker, and more dangerous than the black mist emanating from those monsters.

Roy raised his head and glanced at the cadres who had gathered in the distance.

"It's not over yet."

There's more down there.