Raid on Onigashima

The Raid on Onigashima was a large-scale invasion and battle that took place on the island of Onigashima in Wano Country during that year's Fire Festival. The invading forces were the Ninja-Pirate-Mink-Samurai Alliance, with the objective of defeating the Beasts Pirates, led by Kaidou of the Four Emperors and his allies, including Shogun Kurozumi Orochi and recent ally, fellow Emperor Big Mom.

They succeeded in their goal after much bloodshed, and with their victory, Wano was finally free from twenty years of tyranny and Kaidou's fiendish New Onigashima Project was foiled thanks to one of the alliance's main leaders, Monkey D. Luffy. In addition, both Kaidou and Big Mom were stripped of their positions as Emperors, with Luffy and Buggy chosen to take their places.

Details
On the night of the Fire Festival, the Ninja-Pirate-Mink-Samurai Alliance had successfully infiltrated Onigashima despite a few hiccups and snuck into the Beasts Pirates' stronghold, the Skull Dome, by using disguises. The raid happened just as Kaidou of the Four Emperors unveiled his master plan which he called the New Onigashima Project; Kaidou began to use his all-mighty dragon powers to lift Onigashima and have the island land on the Flower Capital in order to turn Wano into a pirate paradise so he could prepare for war against the World Government itself.



Kaidou's fellow Emperor Big Mom was reunited with Charlotte Perospero, her first-born and an officer of the Big Mom Pirates and stated that joining forces with Kaidou was her idea, so her son reluctantly accepted her decision. Fortunately, Marco the former first division of the Whitebeard Pirates prevented the rest of the Big Mom Pirates from entering Wano and joining the battle that would soon take place. Some agents from CP0 were also present at the party as Kurozumi Orochi's guests. After 20 years of waiting, the loyal retainers of Kozuki Oden attacked Kaidou with all their strength to avenge their master's death and help make his dream of opening Wano's borders a reality: this marked the start of the full all-out battle.

Course of Events


All the samurai present on the Live Floor were awestruck by the Straw Hat Pirates as they showed off their extreme battle prowess by defeating a substantial portion of the Beasts Pirates' forces with relative ease. Then as the Straw Hats stood united against their foes, Monkey D. Luffy, the captain of this motley crew confidently proclaimed that he would be the one to defeat Kaidou. Since his former comrades tried to kill him, X Drake decided to lend his aid to the alliance despite some of the members being suspicious of him. Despite being infected by the man-made virus Ice Oni, the former yakuza boss Hyogoro defeated several members of the Orochi Oniwabanshu and the Mimawarigumi, being cured shortly afterwards by Chopper. The Beast Pirates’ Tobiroppo were all highly skilled fighters, but eventually Page One, Ulti, Sasaki, Who's-Who and Black Maria had all fallen in battle at the hands of a member of the Straw Hat Pirates (And one accidently by Big Mom.) Around the same time the Straw Hat crew’s young companion Tama began to do her part to help; every Beast Pirate who ate Tama's special dangos became the child's obedient servants and on her order, attacked their ex-crewmembers. This act played a key role in turning the tide of the battle in the alliance's favor. Yamato, the son of Kaidou who wished to see the end of his father's regime over Wano, started helping the Alliance by helping Shinobu and Oden's son Kozuki Momonosuke escape enemy forces. Yamato then fought his father to a standstill until his new comrades returned.



Knowing he could not do anything to help as a child, Momonosuke asked Shinobu to use her power to turn him into an adult. This allowed him to transform into a giant pink dragon so he could fly Luffy back to Onigashima after he was temporally thrown off and indisposed. After leaving with Yamato so Luffy could face Kaidou alone, Momonosuke began to use his new power to create flame clouds and pull the Onigashima with all of his might to prevent the flying island from landing on the Flower Capital. Killer dueled Basil Hawkins as he desired revenge for his earlier betrayal. Hawkins used his special straw dolls to transfer all damage to Killer's captain Eustass Kid, however, he made a grave miscalculation, since Kid's left arm was a metal prosthetic, it was unaffected by Hawkins' power, so Killer wound up slicing off his left arm, thus defeating Hawkins. The 3 All-Stars of the Beast Pirates were undoubtedly Kaidou’s greatest warriors and were a major obstacle between the Alliance and victory. After an intense battle Inuarashi and Nekomamushi were able to simultaneously defeat the All-Star Jack and Perospero the eldest son of the Charlotte Family after regaining their Sulong forms. Sanji confronted the All-Star Queen who is a powerful cyborg. During the fight Sanji angrily discovered the genetic modifications given to him by his hated father had finally awaken. Sanji then used his new abilities to create new destructive techniques to overwhelm and defeat Queen. Roronoa Zoro engaged in a dual with the strongest All-Star King who is a member of the fire manipulating Lunarians that are widely believed to be extinct. Thanks to the properties of the legendary Haki-powered sword Enma  and his recently discovered Haoshoku Haki,  Zoro was able to eventually defeat King despite being injured and exhausted. Before dying from his injuries, the traitor Kanjuro used his paint powers to create a fiery creature called Kazenbo that was sent to detonate all the explosives in the Skull Dome's basement. However, this plot was foiled thanks to the interference of Yamato who froze the bombs just in time.



As their fight with Big Mom continued, Trafalgar Law and Eustass Kid pushed themselves beyond their limits against the Emperor as she decimated everything and everyone in her path. Law and Kid decided that their only option left was for both of them to use their awakened powers that would drain what was left of their stamina. In the end they triumphed over Big Mom as she crashed through the floors of the Skull Dome and off Onigashima.Raizo won his dual against Fukurokuju when his fellow ninja veteran collapsed from dehydration courtesy of the raging flames throughout the Skull Dome. In order to save everyone from the very same flames Raizo summoned a vast amount of water with his scroll-based ability, and Jinbe used his Fish-Man Jujutsu to hurl the water down throughout the castle to extinguish all of the fire. CP0 who had been observing all this chaos, were ordered to capture Nico Robin but were foiled thanks to Brook carrying her away as much as he could and Izo sacrificing his life in order to prevent her abduction. While he was briefly trapped under a pile of rubble, Kurozumi Orochi was beyond shocked when he discovered that the geisha "Komurasaki" he was enamored with for so long was in reality his enemy Oden's daughter, Kozuki Hiyori. In a final attempt to take his revenge, Orochi broke free and was caught on fire from what was left of Kazenbo, yet he still attacked Hiyori with extreme fury, but was stopped by the timely arrival of Denjiro, who sliced off Orochi's last remaining head, finally putting an end to the wretched tyrant's life.



As the battle between them intensified Kaidou was glad that he finally found a worthy opponent to fight after all these years and realized he hasn’t had this much fun since he fought Oden. Just then CP0 received orders to make sure Luffy lost the fight because the Five Elders knew the repercussions the end of Kaidou’s reign would have on the rest of the world. So, Guernica held Luffy in place so Kaidou could deal the finishing blow. This act actually caused what the Five Elders feared most: Luffy finally awakening his Devil Fruit. Luffy then new extraordinary abilities in creative and unpredictable ways against all of Kaidou's powerful, unrelenting attacks. In the epic last stage of their battle, Luffy was able to make his fist the size of an island and unleashed a mighty final attack, emerging victorious and causing Kaidou to finally accept that Luffy was indeed Joy Boy who he foresaw would one day come to defeat him. Kaidou fell so hard into the ground, the collision made a massive crater leading into an underground chamber filled with magma, where both Kaidou and Big Mom's unconscious bodies ended up. This event caused a volcanic eruption where Onigashima once stood, symbolizing both Wano's liberation and the official end of Kaidou and Big Mom’s era as rulers of the sea.

Progress
The following is a list of status updates provided by CP0 with the help of the Mary network.

Aftermath


After several lengthy and difficult battles, against all odds, what was thought to be impossible happened; two of the Four Emperors, Kaidou and Big Mom, were defeated by three infamous pirate captains of the Worst Generation, Monkey D. Luffy, Trafalgar Law, and Eustass Kid. In the end, the raid was a total victory with Kurozumi Orochi being deceased and the Beasts Pirates lost all their power in Wano Country, causing many of the Beasts Pirates to flee or be imprisoned in Udon and some of them had defected to the alliance's side during the battle either because of Chopper saving them from the biological weapon Ice Oni or because they were tamed by Tama. Also, CP0 agent Joseph retreated via Geppo so he could report to the World Government everything that happened during the battle. Kaidou's precious New Onigashima Project that he had been working on for decades was now totally in shambles with Onigashima itself having landed near the Flower Capital instead of on top of the city as Kaidou intended thanks to the power of Dr. Vegapunk's Artificial Devil Fruit and Kaidou's once mighty fortress, the Skull Dome, was now in ruins. After giving it much thought, Kozuki Momonosuke, the rightful heir of Wano, decided to postpone opening Wano's borders for the time being. With all enemy forces vanquished, Momonosuke became the new shogun and announced to his subjects that Kaidou and Orochi would no longer oppress them. After hearing this, the people of Wano rejoiced at their regained freedom.



Days later, the children of Wano received new schoolteachers who told them the true heroic tales of Kozuki Oden and shrines were planned to be built so that Oden could finally be laid to rest, along with the members of the alliance that gave their lives for the rebellion, including Shimotsuki Yasuie, Ashura Doji, and Izou. Everyone in Wano also soon learned of Komurasaki and Kyoshiro's true identities as Kozuki Hiyori and Denjiro. As Luffy asked Momonosuke to not give his name to the people of Wano due to his humility, everyone in the country came to know him as the warrior Joy Boy and heard about the tale of how he defeated Kaidou with the citizens comparing his heroism to Shimotsuki Ryuma and became forever grateful for ending his reign of terror.



Naturally, news of Kaidou and Big Mom's defeat soon spread across the seas; it was then before the banquet to celebrate the alliance's victory that Scratchmen Apoo arrived and showed those present the newspaper, which named the new Emperors of the Sea as well as an update on everyone's new bounties. It was announced to the whole world that "Straw Hat" Luffy and Buggy the "Star Clown" had replaced Big Mom and Kaidou as Emperors. Additionally, Luffy, Law, and Kid had been assigned bounties of 3,000,000,000 each. To the dismay of the Five Elders, Luffy also got a new picture in his wanted poster showing the whole world his awakened form, and the Marines did not receive the order to remove the initial D in his name. Luffy's new status as an Emperor unintentionally help increased the influence of his sworn brother Sabo of the Revolutionary Army after the notoriety he gained from the events from the recent Levely. To top it all off, every current member of the Straw Hat Pirates had their bounties greatly increased as well, indicating they were now an even bigger threat to the World Government than ever before.



After Marine Admiral Ryokugyu was driven out of Wano thanks to Shank's interference, Yamato decided to wait before joining the Straw Hats as felt he needed to help protect Wano from other outside threats for the time being and also, he wanted to start his journey by exploring Wano before setting out to sea just as Oden did. In addition, Big Mom is now known to the people of Wano as "O-Lin the Great Yōkai" and learned of her role in the great battle and as a result has become a legend in Wano just like Kaidou who the Wano citizens now call the "Dragon King". Before Luffy and his crew left Wano, he gave Momonosuke a copy of his Jolly Roger so that everyone in the outside world would know that Wano was an ally of the Straw Hat Pirates. Luffy also told Momonosuke, Kin'emon and Yamato are welcome to join his crew anytime in the future.

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