Pirates of the Magical World II
Revenge of the Aztecs
The summer after she graduated, Fleur takes a 'vacation' to the Caribbean with her parents and Gabrielle. In Nassau, Fleur finds Harry and his ship, the Rogue Cutlass. She 'reacquaints' herself with him. Harry decides to humor her while he and his crew loiter in town, regaling her with tales from his latest exploits. She informs him of the dark stirrings in England that she's heard about (Death Eaters reemerging, Voldemort's whispered return).
Then, unexpectedly, Nassau gets attacked by an army of Aztecs. During the mayhem, the Aztecs take Gabrielle captive, among many hundreds of others. When she discovers her sister was missing, Fleur approaches Harry, demanding answers and information on the Aztecs. When she learns of the blood magic and sacrificial rituals they use, Fleur tries to talk him into helping her save her sister. But Harry is quite reluctant to do anything so dangerous, especially since the Aztecs possess levels of power that he hasn't yet achieved. However, Fleur changes tactics and bribes him with super-rare gems.
The Rogue Cutlass pursues the Aztec ship from Nassau to Havana, Cuba to Heroica Veracruz, Mexico. Each time they spot the ship, the Aztec magician conjures some new monster or obstacle to stall or attempt to destroy Harry's sloop. Reaching Mexico, Harry takes Fleur and a small number of his crew inland to save Gabrielle. They track the Aztecs all the way to Mexico City where the Aztec High Priest is already performing some obscure sacrificial ritual that is gathering immense power about him. Rather than fight the High Priest, Fleur and the pirates sneak in and save Gabrielle from the holding area and rush back to the Rogue Cutlass.
The Aztec High Priest sacrificed a hundred thousand men, women, and children to gain the power to destroy lands and control the seas. The priest uses his newfound power to fracture the continents and floods the world. But the price of such overwhelming power costs him his life midway through his attempt at sinking the European and American lands. However, despite that setback, he'd successfully managed to tear the continents into over 20 smaller ones, creating over a dozen new seas and six new oceans, killing millions of people in the upheavals, destruction, and flooding. This destruction sends the world governments and people (magical and normal) into chaos and disarray. In an ironic twist of fate, the Aztec's best efforts at ridding the new world of their true enemies (pirates and merchants) is mostly ineffective since they were able to survive by riding the tsunamis safely out at sea.
With no home waiting for them (or even sure where France was anymore), Fleur and Gabrielle are allowed to remain on the Rogue Cutlass. Fleur becomes the ship's new repairwoman and Gabrielle becomes an assistant cook. Harry decides to set sail and explore this crazy new world, mapping out the new shorelines and searching for potential commerce hotspots to raid and plunder. It's a new world and he was eager to see it.
(Author's Note) Now we really start to see the real potential for this series. I really hope someone decides to write or use these ideas!
PS: I have not read or seen One Piece since the earliest of chapters. So when you guys ask me if this is derived or crossed over with One Piece, the answer should be an all-too-obvious "NO!"