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One Piece: Becoming the strongest pirate (COMPLETED)

An ordinary person from earth gets transmigrated into One Piece world. He wakes up in an uninhabited unknown island in east blue. Follow his struggle as he tries to survive in this cruel world and become the strongest pirate. (MC is not Ace) Disclaimer: I do not own one piece or any of its characters and I also do not own the cover image.

Captain_Erebus · Anime & Comics
Not enough ratings
145 Chs

Ashen - Big Mom War

As Big Mom gazed in disbelief at the twenty towering giants dominating the battlefield, her initial speechlessness quickly gave way to anger, her features contorted in rage. "You little shit..." she seethed, her eyes flashing with fury.

The giants' glares bore into Big Mom with hostility. Without hesitation, Dorry and Brogy launched their combination attack, synchronizing their swings and unleashing a devastating shockwave that tore through her armies. The force of the strike sent hundreds of her soldiers hurtling through the air, scattering them across the battlefield. With a thunderous roar, they cried out their attack name "Ikoku Sovereignty!"

"Yoo, Big Mom!..." Ashen vanished from the hilltop and in a flash of speed, materialized atop Big Mom using his Inferno Jet Step "Demonic One Sword Style…"

"You're pretty fast!" Big Mom commented, gripping her sword Napoleon tightly and preparing to face him head-on "Maaa ma ma ma…Bring it on brat!".

Ashen's grin widened with excitement as he channeled his blueish-purple flames into his sword, infusing it with his Conqueror's Haki. The result was a thick black lightning, tinged with a deep red hue. "Celestial Cleave!" he shouted as he sent a wide projectile slash towards Big Mom's forces. The attack was devastating, rendering every cannon fodder near her unconscious as the flames roared with intense heat.

"Ikoku!" exclaimed Big Mom as she brandished her beloved sword, Napoleon, which transformed into a sharp longsword. With incredible force, she swung the weapon, unleashing a shockwave that reverberated through the air.

*BOOOOM* As the two attacks collided, Ashen's slash proved to be more powerful, slicing through Big Mom's shockwave effortlessly, as she had neglected to imbue it with Conqueror's Haki. The momentum of the slash carried it towards her, forcing her to hastily block with both hands, which were enveloped in a protective coating of Haki. With a swift motion, she deflected the attack, sending it hurtling away from her.

"That's!!...Haoshoku infused attack!" Big Mom's expression was one of surprise and shock at the display of strength "Who the hell are you brat?!"

*Footstep*-*Footstep*-*BOOOM* Calvin spotted his captain amidst the battlefield and immediately bolted towards him. Utilizing the formidable combination of Rokushiki and Hasshoken, he unleashed a devastating shockwave that tore through the earth and sent him hurtling skyward.

Big Mom noticed Calvin's sudden appearance. "Are you foolish enough to underestimate me, you insolent brats?!" she roared, her voice laced with anger and annoyance.

"Finally," Calvin exclaimed as he took to the air, his eyes fixed on Big Mom. "I've been waiting for ages to take on an emperor." Flames erupted from his outstretched arm, the heat intense enough to melt steel. The fire danced and flickered, as Calvin infused his attack with Advanced Armament Haki. He then braced himself with Tekkai, hardening his body to amplify the impact of his attack. With a mighty roar, he plummeted down towards Big Mom, his knuckles emitting a shockwave as they connected with her flesh "Smash!!"

*BOOOOM* As Calvin's fist hurtled towards Big Mom, she nonchalantly raised her right arm, intercepting the blow with ease.

Big Mom's sinister smile widened as she spoke, her voice dripping with condescension. "Maaa ma ma ma...not bad, but..." With lightning-fast reflexes, she snatched Prometheus from her side and channeled its power into her fist. With a tremendous roar, she unleashed her attack, hurtling towards Calvin with the full force of her might. "Heavenly Feuer!"

With swift reflexes, Ashen intercepted Big Mom's powerful punch using his sword. The force of the impact caused a massive explosion, but Ashen remained unscathed. Without wasting a moment, Ashen swung his fiery sword and cleaved Prometheus in two, the blade burning through the substance of the Sun homie as if it were mere paper.

"AGHHH!! It hurt mama!!" Prometheus let out a howl of agony, calling out to Big Mom, as Ashen and Calvin stepped back, readying themselves for their next strike.

"As expect from an emperor of the sea, she's strong" Calvin stated while calmly standing near Ashen.

"Tch…What a tough bitch" Ashen said while gazing at Big Mom.

A few minutes earlier,

"I won't let you!" Katakuri foresaw Ashen's attack two seconds into the future and attempted to move to intercept it, but Enel and Moria intervened to halt him in his tracks.

"You stay back!" Enel roared as he appeared in front of him at lightning speed and stunned him with a massive beam of electricity "El Thor!"

"Mochi Wall!" Katakuri proceeded to raise a massive wall of mochi from the ground using his awakened ability, coating it with Haki to stop Enel's attack, before he quickly created a whole in his stomach as he saw Moria's attack from behind using his future sight.

"As expected, it's not going to be an easy task" Moria leaped backwards, a wild grin spreading across his face as he tightly clutched his weapon with both hands. His sword was soon imbued with a powerful combination of Haki and shadow power. With a swift motion, he sent a wide and powerful projectile slash hurtling towards his target "Kishishishi! Take this!"

As the flying slash approached Katakuri, the shadowy aura surrounding it transformed into multiple black spears, flying toward him. Meanwhile, the blade of the slash threatened to cleave him in two.

<Brick Bat: Black Spears>

Katakuri proceeded to dodge the attack with ease and then launched himself at Moria, before he tightly twisted his mochi arm and then untwisted it while thrusting his trident Mogura forward, creating a very powerful drilling stab "Mochi Thrust!".

"Shit!"…Kagemusha!" When Moria saw that, he immediately swapped location with his dark silhouette that he created earlier "Damn it! What an annoying ability!".

<10,000 Volt Vari>

<Shadow Blitz>

Without leaving Katakuri the chance to react, Enel kept unleashing streams of lightning bolts from his fingertips to attack him, while Moria simultaneously used his shadow power to create flurry of shadow fists that struck him from multiple directions at once. Using teamwork and coordination, the two of them kept trying to keep him off balance and overwhelm him with attacks.

..

"Everyone has been getting some good fights recently…It's time for me to shine!" With a declaration, Ian unleashed a shockwave from his feet, utilizing the powers of Soru and Geppo to propel himself forward, landing into the heart of the battlefield. He pointed his bat at the dozens of soldiers standing before him, beckoning them to come at him all at once. "Let's see what you've got" he taunted, ready to face them head-on.

"Don't look down on us, Ashen Pirates!" said one of them before he jumped at Ian swinging his sword downwards.

*Bang* Ian's powerful swing sent the enemy hurtling to the side, but he wasn't done yet. Channeling the force of Hasshoken, he smashed his foot into the ground, causing it to split open and sending his foes tumbling to the ground. Without skipping a beat, Ian unleashed a devastating Rankyaku, a compressed blade of wind that sliced through multiple enemies.

*Bang*-*Bang* Ian kept restlessly smashing their head until he was suddenly kicked away.

"That's enough!" said an extremely tall 18 years old girl with a tan skin, blue eyes, prominent lips with silver lipstick and a long wavy white hair that covers her right eye. She's carrying a massive sword in her right hand.

A few seconds later another figure appeared beside her, an enormous man with an extremely thick body. His head and arms are covered in semi liquid substance, which compose a very large beard. They are Charlotte Smoothie and Opera.

"*Whistle*…Holy shit! Those are the biggest melons I've seen in my life!" Ian said, admiring Smoothie's body as grasped his metal bat with two hands while cracking a smile "You're hot, but unfortunately I'm still going to crush you"

"Tch... I'll teach you a lesson" Smoothie sneered, tightening her grip on her sword with both hands. She unleashed a barrage of massive flying blasts toward Ian, each one more powerful than the last.

*SWOOSH*-*SWOOSH* Using a combination of Soru and Hasshoken and Observation Haki, Ian easily dodged the flying blasts, before he channeled the Hasshoken energy from his hand into his metal bat, and then sliced through the air with incredible speed, creating a powerful shockwave that tears through enemies like a blade.

"Thunderous Blade!"

Smoothie nimbly redirected the attack, then swiftly charged towards Ian. Utilizing her devil fruit power, she infused her sword with the liquid of the defeated opponents that she had absorbed earlier, causing it to grow to an immense size. With her enhanced blade, she unleashed a powerful slash towards Ian.

*BOOOM* The airborne slash surged forward with even greater force than its predecessor, hurtling directly towards Ian. He hastily raised his trusty metal bat to meet the attack, but the sheer power of the strike still sent him stumbling backwards.

When Opera saw that he quickly took advantage of the opportunity and struck Ian using his devil fruit power "Cream Monster!" By producing a large amount of cream, Opera formed multiple tentacles out of it, giving him the appearance of a Kraken. He then attacked Ian with the mass of cream.

"What the hell is this?!" Ian was taken aback seeing the mass of cream following him, he tried to back away, but he was quickly stopped by Smoothie who overwhelmed him with attacks, until he was surrounded by creams "AGHHHH-FUCK!!" Ian screamed in pain as he was burned by the cream's sugar, before Smoothie slashed his back leaving a large cut.

When Ian saw the situation, he quickly propelled himself in the by sending a shockwave from his feet and jumped a few meters away 'Shit these two are bad business…They are both using devil fruits power'

"Man, you're a one ugly motherfucker…I can't believe she's your sister" Ian said to Opera as he slowly walked towards them again "It's been a while since I've been this pumped"

"Hm?...That's Cracker, or his armor as Ashen said" Urouge exclaimed looking at the large, brutish-looking warrior with a prominent nose, a large pointed beard, disproportionately thin limbs, and a prominent scar on the right side of its face.

"Urouge -san, Brother Ashen said the armor is very strong, and Cracker can create an endless amount of them" Yamamoto stated while standing near Urouge "We should probably find the real one and deal with him"

"That won't be an easy job" Urouge said, before Cracker swung his massive sword at their direction.

*BOOOM* Yamamoto sidestepped while Urouge used his huge pillar to stop the attack.

"What a power!" Urouge exclaimed before Yamamoto used his devil fruit power to enlarge his Kanabo many times while coating it with Haki before he tried to smash crackers head.

"Titanic Smash!...*SWOOSH*-*BANG*" Cracker proceeded to grow four more arms with swords and blocked Yamamoto's attack "Thousand Arm Cracker, that's where his name came from"

"*Clang*…*GUN-SHOT*-*GUN-SHOT*…" Diana was standing miles away from the battlefield before she calmly aimed her rifle at Charlotte Mondée and fired several Haki-coated bullets.

Mondée wasn't aware of that as Diana was out of her Observation Haki range and didn't sense her presence, while she was occupied fighting the first bullet managed to pierce her left arm before she quickly got noticed and dodged the other ones "A sniper?!"

"Tch…She noticed" Diana proceeded to use Soru and Geppo after that to close the distance before she fired several more bullets, and then used Rankyaku to send a compressed wind blade towards her "As expected of Big Mom officers, all of them are strong fighters"

"Maaa ma ma ma…I guess you are not just some cocky brat" Big Mom said as she turned Napoleon into its seax form, before she sets it alight with Prometheus flames "Then I should also get serious…Cognac"

"I told stupid hag. Fire is useless against me!" Ashen stated as turned into his awakened form, getting engulfed with indigo flames before a sudden fire pillar was shot from the ground underneath her.

"Huh?...*BOOOM*" Big Mom was taken by surprise and got shot off of Zeus before Calvin and Ashen flew towards her and punched her while emitting a shockwave sending her down to the ground.

Big Mom looked furious at that and quickly got on her feet and proceeded to thrust Napoleon at Calvin while stretching the blade. Calvin managed to block it and the flames didn't hurt as he was using emission, but he still got sent flying back a few meters.

Ashen quickly came crushing down at Big Mom with his Haki-coated sword, which the latter countered with hers. As their forces collided, a colossal shockwave reverberated through the air and bolts of black lightning crackled and surged between them, despite their lack of physical contact. Both wielders were harnessing advanced Conqueror's Haki, unleashing an immense energy that could be felt for miles around.

'I should quickly unlock Internal Destruction, or my whole plan will be ruined' Ashen thought as quickly used Inferno Jet Step to appear on Big Mom's side before he slashed towards her, while trying to have his Haki flow from his sword inside her body to damage her.