One Piece Crossover

Ronan didn't think his life could get worse after being abducted by an alien. Until that one day, two days, one week, turned into three months, he was forced to to get cozy on a post-war planet fresh out of the dark ages.

Everyone mocked him. The useless son-in-law. The weak heir. But beneath that quiet facade...he is the one they should fear. Betrayal, Divorce, and Revenge are coming but no one will see it coming. Can the incredible son in-law rise from shame to claim what is rightfully his?

Lex died pathetically. One wrong night. One nervous robber. One bullet. That should have been the end. Instead, he wakes up in a Novel he had crafted, reincarnated as a nameless palace servant in the magical city of Greyl, Lex finds himself at the very bottom of a world ruled by monsters, mages, and ruthless nobles. Worse, he isn’t the protagonist. He’s a background character. A disposable extra in a story that devours people like him. But death grants him one mercy. A Survival System. No glory. No hero’s destiny. No chosen-one prophecy. Just one directive: Live. Armed with fragmented knowledge of the world’s future and a system built purely for survival, Lex plans to remain invisible. Adapt. Endure. Escape the coming disasters. But something is wrong. The body he inhabits is not ordinary. Beneath the servant’s rags lies a lineage erased from history, a bloodline that once made ancient prodigies kneel… a power that commands a presence capable of tipping Aetheria’s fragile balance in a single night. Now the world isn’t just dangerous. It’s watching him. And if the they discovers what he truly is... Survival may no longer be enough.

Abel Park…A young,normal teenager settled in a quiet, seemingly abnormal town of Bartlesville. Getting there,he comes upon a fate. One that would change his life. One that wields the fate of every Supernatural in the world. He realizes he is a MULTIBREED

Everyone in New York laughed at Jack Ironheart. Three years of being walked all over by the Hart family. Three years of being insulted, hit, and spat on. They called him trash, useless, and a beggar. But one night they made one fatal mistake: They framed the wrong man. Jack Ironheart is the Undefeated God of War, the living legend every army on Earth thought was dead. One call from him and the Phantom Legion rises. One look from him and Manhattan goes black. And the richest men in New York suddenly see their bank accounts drop to zero. But now the same enemies who faked his death years ago are hiding inside the Hart family mansion, smiling. Now the worthless son-in-law is done pretending. New York will burn until every traitor begs. And the Undefeated God of War never loses.

One night, citizens in nine districts were frightened by the arrival of a large group of black robes resembling human forms named ORION. They hunted teenagers to be taken away to an unknown place, while other people who tried to get in the way would not hesitate to be killed right away. Because of the hunt, a small group of teenagers with a special ability called TENVIS appears. The formation of their group is based on the goal of destroying ORION. However, when it is revealed that one of them is the main key to stopping ORION, what will they do in the end? Keep solving it together or sacrificing that one person?

Abandoned by his parents, betrayed by the woman he loved, and mocked for his poverty, Julian Williams had nothing left to live for. Until one day, a group of powerful men appeared before him with an unbelievable offer, become the new CEO of Magnus Empire, one of the world’s most powerful business empires! Overnight he became a billionaire, but Julian has only one thing on his mind; REVENGE! “Mr. Boss! Your Ex-fiancé demands to see you,” “I do not have any fiancé. Get rid of her by all means,”

Ryn had been powerless all his life. The three things Ryn is lacking are food, attention, and physical strength. He has no concept. No status. No future. He long ago gave up dreaming he'd be strong. Then one day, when he is supposed to die, there is a spark inside of him. END. One day it happens, everyone who previously looked down on him has something to fear. Power transforms people, though. Then one day, the boy who was only looking for power to survive becomes the most dangerous foe that Aurelia has ever encountered.

Pens up, Papers down, Power's primed. Something is wrong with this school. Students that harass one another because of their lineage or prestige. Teachers cannot do anything because of the law, and an eccentric Student Council President that expects total obedience to his accords. But according to Marc Callahan Noan, he wanted nothing to do with any of it. But little did he know, that he will be one wheel that will turn the gears of fate. Stand up, Bow down, Greet One and All. CLASS IS IN SESSION! (I will also post this on other sites like WebNovel, Honeyfeed, and RoyalRoad)

At eighteen, Marco Velez lost everything. A single accusation turned his family name into a curse. His father’s business collapsed overnight, his mother died in despair, and his ex-girlfriend married the one person he trusted least, his half-brother, Damian Cruz. Years later, the city he was cast out from thrives under Damian’s empire of luxury and deceit. But fate has a cruel sense of timing: Marco inherits a vast fortune from a mysterious benefactor, and with it, a second chance. Under a new identity, Marco returns to the glittering streets that destroyed him. Armed with wealth, intellect, and vengeance, he begins dismantling Damian’s world, one secret, one betrayal, one empire at a time. But when his most loyal ally turns out to be working for Damian, Marco must decide what matters more: vengeance, justice, or his own humanity.