I collect everything in the One Piece world.

However, Mo Sen was confident and even somewhat eager to try, because he also wanted to test where his limits really were.

Moreover, combat is always the best way to improve one's strength. It is far faster to engage in a real battle than to bury oneself in hard training.

Armament Haki, Observation Haki, swordsmanship, combat skills, Devil Fruit abilities—he has so many things and skills to hone.

"Use your artillery fire to sharpen my blade, and bury yourselves in the process," Morsen murmured in a deep voice.

Outside the window, the weather was still sunny and a gentle breeze was blowing; everything was calm, but he knew that a storm was about to break.

At some point, Robin also walked to the window and stood side by side with Morsen, gazing at the beautiful water city that was about to face catastrophe.

"Are you still scared?" Mosen asked Robin softly.

Robin shook his head upon hearing this, and chuckled lightly with a relaxed air that he hadn't shown in a long time, "I'm not afraid, in fact, I feel quite good."

"After all, this is the first time I've fought alongside my partners against those guys. It's much better than running alone in the dark, waiting for unknown pursuers."

“But…” she paused, looking out the window and whispering, “But the peace of this city is about to be shattered, and I’m about to watch another city be destroyed…”

“It will not be destroyed.” Mosen’s voice was calm, but unusually firm.

"On the contrary, we will make those who deserve to pay the price pay the price. Some things are not up to them."

"Besides, it's not certain who will destroy whom."

Chapter 150, The Demon-Slaying Order, Steel Rain

Outside Water 7, the calm sea was rippled as ten of the Navy Headquarters' most elite large warships, like mobile steel fortresses, subtly surrounded the entire Water 7.

The pitch-black muzzles of the cannons protruded from one side of the ship, densely packed, gleaming with a cold, sharp light under the gloomy sky, coldly pointing towards the bustling and beautiful floating city ahead.

On the deck of the central flagship, Vice Admiral Momonga, draped in a naval justice coat, was holding an encrypted Den Den Mushi (snail phone) and conducting final tactical confirmations with four other vice admiral ships responsible for different directions.

"Onigumo, your unit is responsible for the eastern and northeastern sectors."

"Understood." Onigumo's cold and concise voice came through the Den Den Mushi.

"Doberman, western and southwestern sector, with a focus on docks and suspected factory areas."

“Leave it to me.” Doberman’s voice was as firm as ever.

"Storobelli, north side."

“Understood,” Strawberry replied calmly.

"Burning the mountain, its south and southeast sides, block the port and main entrances and exits."

"Understood," Huoshaoshan replied.

Then, the flying squirrel also looked at the increasingly clear outline of Water Seven in its field of vision, its brows furrowing almost imperceptibly.

The Buster Call, no matter how you look at it, makes the feeling of having your guns pointed at an island inhabited by civilians extremely unsettling.

But an order is an order, and as a soldier, he only needs to obey orders.

Just as he was about to continue issuing orders and making arrangements, a series of hurried footsteps came from the direction of the cabin.

Spandam led Kalifa, Kujiri, and Otonashi Owl onto the deck.

Spandam changed into a crisp black officer's uniform, his face flushed with a mixture of excitement and cruelty, as if he couldn't wait to witness the destruction of Water Seven.

"Lieutenant General Flying Squirrel!" Spandam strode up to Flying Squirrel, his voice shrill with excitement: "What are you waiting for? Immediately! Right now! Open fire at full speed! Cover all areas, especially the docks and the city center!"

"We absolutely cannot let Blackmosen, Nico Robin, or those bastards Iceberg and Franky get away!"

His remaining informants in Water Seven had just sent a secret report that Iceberg was organizing a large-scale evacuation, which made him extremely anxious.

All the credit he had just earned had vanished! Now he absolutely couldn't let the duck that was already in his mouth swim away again!

The flying squirrel turned around, looking at Spandam expressionlessly, and said in a calm but unquestionable tone, "The Buster Call has been legally initiated by you, but from the moment the fleet completed its deployment, the command of the operation belongs to the Navy."

"I, Vice Admiral Momonga, the commander of this Buster Call fleet, am fully responsible for the specific details of how to carry out the bombardment."

"Please retreat to a safe area now and do not interfere with military operations."

"What?!" Spandam's face flushed red instantly, as if he had been greatly insulted.

"Get this straight! It's me! I have direct authorization from the Five Elders! I am the highest-ranking person in charge of this operation! Your Navy is merely the weapon to carry it out!"

"I order you to open fire at full speed immediately! Otherwise, if we miss our opportunity and the target escapes, can you afford the consequences?!"

The flying squirrel frowned even more, a hint of disgust flashing in its eyes.

Just as he was about to speak, Spandam seemed to remember something, pulled a Den Den Mushi from his pocket, and quickly dialed.

“Brubrubru… Brubrubru… Kacha.”

The Den Den Mushi connects, and the figure transforms into a bespectacled, meticulously styled man—Fleet Admiral Sengoku.

"Fleet Admiral Sengoku!" Before Sengoku could speak, Spandam interrupted, "I am Spandam! I am currently aboard the flagship of the Buster Call fleet!"

"Lieutenant General Momonga has refused to carry out my artillery order, which is seriously hindering the mission! I demand that you immediately order him to obey my commands unconditionally! This is the will of the Five Elders!"

There was a few seconds of silence on the other end of the Den Den Mushi before Sengoku's voice came through slowly, carrying a deep weariness and an undeniable authority: "Give the phone to Momonga."

Spandam, quite pleased with himself, shoved the Den Den Mushi into the flying squirrel's hand.

Momonga took the Den Den Mushi and replied in a deep voice, "Marshal, this is Momonga. A large-scale evacuation of non-combat personnel is underway in the target area. Should the initial artillery fire be adjusted to a warning or restrictive coverage?"

"Flying Squirrel," Sengoku interrupted him, his voice coming through the Den Den Mushi and ringing clearly in the ears of the flying squirrel and the surrounding naval officers.

"Spandam holds direct authorization from the Five Elders, and his orders are the highest priority for this operation. Execute the order."

Upon hearing this, the knuckles of the flying squirrel holding the Den Den Mushi turned slightly white. He was silent for a moment, then straightened up and replied in a deep voice, "...Yes, Marshal. I understand."

After hanging up the phone, the flying squirrel handed the Den Den Mushi back to the smug Spandam, then turned to face the command post and the officers of all ranks waiting for orders, his face devoid of any emotion, only coldness and resolve.

"Order all ships! Target: Water Seven! Saturation bombardment! After one salvo, each ship shall fire freely from its designated area!"

"Fire!!!"

The command shattered the last silence on the sea.

next moment

Boom! Boom boom boom boom boom!!!

Ten warships roared simultaneously!

Orange-red flames erupted from countless cannon muzzles, and thick smoke instantly filled patches of the sea.

Heavy cannonballs tore through the air, piercing the sky with a shrill shriek, and poured down toward Water Seven!

Spandam's eyes widened, a look of wild joy spreading across his face, and he practically lunged to the side of the ship, craning his neck.

He wanted to witness the destruction of Water City with his own eyes, to hear the deafening explosions and desperate cries.

"Yes! That's it! Explode! Explode them all to pieces! Hahahaha!"

Kalifa stood behind him, watching the cannon fire that could raze any island to the ground, and her inexplicable unease about the "Collector" seemed to be suppressed once again.

Under such firepower, does individual strength really matter?

The city of seven waters, with its docks and streets.

The chaos of the emergency evacuation had not yet completely subsided; the docks were packed with people, and boats were stuck in the canal.

In this moment of utter chaos, a piercing scream, a symbol of destruction, came from the horizon and rapidly amplified.

People instinctively looked up and saw countless black dots trailing flames, densely packed, covering the entire sky and hurtling toward each and every one of them!

Time seemed to freeze at that moment.

The crowded people fell into a deathly silence, with only heavy, desperate breathing remaining.

The emergency broadcast from the iceberg continued to repeat, but panic had long since overwhelmed all rationality.

“Navy…naval force…?” someone murmured in a trembling voice.

They weren't pirates, they were marines! The marines, who were supposed to protect them, instead turned on them!

"The...the Buster Call...it's the Buster Call!!!"

An experienced old boatman shouted loudly.

The Buster Call! These three words instantly awakened the fear deeply rooted in the memories of the residents of the Grand Line, shattering everyone's last shred of hope.

No one will judge, no reason will be needed, only absolute and utter destruction!

The legend of Ohara is not just a legend; perhaps from this day forward, Water Seven will become another legend.

Despair, like a tidal wave, instantly engulfed everyone.

Escape? Where to escape to? The entire island is already under heavy artillery fire!

Hide? Where could they possibly hide? Under that kind of firepower, any cover would be as flimsy as paper or clay!

Iceberg stood at the window of the city hall, looking at the trajectory in the sky that represented death and destruction, his face ashen.

He still couldn't save them... He ultimately failed...

Cries, screams, desperate prayers, and curses against the World Government and the Navy erupted instantly, but were quickly drowned out by the whistling of approaching shells.

Many people collapsed to the ground, giving up the struggle, their eyes vacant as they watched the artillery fire draw ever closer, helplessly awaiting their death.

Then, just as the storm of steel was about to engulf everything, a miracle, or rather, something beyond their comprehension, occurred.

A gigantic, semi-transparent phantom that almost covered the entire sky above Water Seven flashed by!

The outline of the phantom was blurry and mysterious, as if it were formed by the superposition of light and shadow from countless rapidly turning giant pages of a book, carrying a strange aura that encompassed all things.

The dense barrage of shells, capable of destroying everything, vanished mysteriously the instant they touched the semi-transparent phantom.

There was no explosion, no fire, and not even a loud bang.

They disappeared completely, as if they had fallen into an invisible, intangible lake, or as if they had been gently wiped away by an unseen giant hand.

Silent and without a trace.

Hundreds and thousands of heavy artillery shells vanished into thin air over Water Seven, under the gaze of countless eyes that went from despair to bewilderment to disbelief!

Dead silence.

A deathly silence, even more profound than before the bombardment, enveloped Water Seven.

The crowded docks and chaotic streets seemed to freeze everyone in place, staring blankly at the sky, at the empty sky that looked as if it had been erased.