My Hero Academia Crossover Fanfiction

Daisuke Hagaromo is a 19-year-old who is completely bored out of life. His bad decisions had gotten him to the worst place he could have imagined when he was younger, and every day of his life felt miserable. He intends to commit suicide in a quick and painless manner, jumping off the roof of the 100-story building with his eyes closed and succumbing to his miserable fate. He dies successfully, but awakens to find himself floating in a void, greeted by a divinely inspired digital system. In exchange for his eternal submission to the system's conditions, the system offers him a chance at a new and more fulfilling life. Daisuke, against his better judgment, accepts the offer and is transported to another dimension of reality. He would be assigned difficult missions and put through impossible trials there, which would later be revealed to be a path to greater life and immortality. ******* This is a system novel set in medieval times with mythical characters and situations. It is NOT a harem, and there are very few sexually explicit scenes. My world building and character development aren't the best, but they will improve with time. I hope you enjoy it, and if you do, please consider supporting, reviewing, commenting, and following. Have a good time!

"If he cannot survive in this Realm and ascend to the Higher Realms, then he is not worthy of being my son!” *** Xiao Tian, the child abandoned by his own parents. He once lived a happy life as the crown prince of the Wang Kingdom. But a great tragedy struck his family—his beloved uncle staged a coup, killing his mother, father, and all those loyal to them. However, the death of his parents was a lie. It was merely a scheme—to leave him behind in the Tianwu Realm, the lowest realm in the Universe. Alone, he rose. Step by step, he walked a path filled with hardship. When he discovered that his parents were still alive, anger filled his heart. But it was not blind rage—it became the fire that forged his resolve to become stronger. With unwavering spirit, he climbed from the lowest realm, ascending through each realm—until he surpassed even his father and became the ruler of the entire Universe! “I, Xiao Tian, swear to overturn this injustice. I will reach immortality and create true peace—so that no one will ever be oppressed again across the Universe. Strength shall no longer be the only measure of justice. And if strength is the key—then I shall become the strongest and be the one who defines justice for all of existence!”

He thought the war was over. One anonymous message proves it never truly ended. When a dormant doomsday protocol Reckoning Wave.awakens in the forbidden Nepharis Void, Rhen and Kessa are dragged back into the void they fought to escape. Deep in a forsaken black-site station, they confront the ultimate betrayal: a perfect clone of Kessa hosting the uploaded consciousness of her former mentor, Director Varn. With only ninety-six hours before quantum entanglement collapses across the galaxystranding civilizations in eternal isolation they must face the mirror of what Kessa could have become. In a labyrinth of shifting corridors, psychological traps, and self-destructing truths, peace demands one final, unforgiving price: destroy the shadow self, or watch everything they saved burn.

“If the crown demands I become a monster, then let them fear what they created,” In an enchanted kingdom of Arcanis, where magic is both a blessing and a curse to the highest ordinate, Camyre, a commoner encounters an ancient artefact that reveals his true identity and activates his hidden powers. With these powers, he is thrust into a game of politics. Camyre finds himself being hunted by two formidable forces. In a land where power corrupts and trust is fragile, Camyre must decide whether to seize the throne and risk the very thing he despises or to destroy the cursed legacy and reshape the kingdom's fate.

Nikaeleon Roch... A name once unknown, now whispered in fear. ~ After spending time in jail for a crime he didn't commit, Nik finds out that he had been betrayed in the worst way possible. His best friend and girlfriend were getting married, his best friend had stolen his company and all that he owned, and they had planned the event that had sent him to prison. They say revenge is a dish best served cold, but for Nik, revenge is best served with pain and blood. He left penniless and returned as the king of the underworld. And he's back for all who wronged him.

In the kingdom of Naviel, Prince Arthur, the seventh prince and son of King Alfred the Great, is despised by his stepmother, Queen Jasmine, and his siblings due to his exceptional charisma and charm. Despite facing constant bullying and schemes against him, Arthur perseveres, navigating treacherous court politics, assassination attempts, and power struggles. As he proves himself through bravery, wit, and diplomacy, Arthur rises through the ranks, earning respect and loyalty from the people and nobles alike. His destiny takes an unexpected turn as he unites warring kingdoms, leads victorious battles, and forges strategic alliances, ultimately becoming the Emperor of the Continent, unifying the land under his wise and just rule.

✅ SYNOPSIS Billy Howell grew up in the modern city of Silver Heights, known by everyone as the unlucky boy who never got anything right. What people didn’t know was that a strange and ancient force had been sealed inside him since birth. That seal kept his energy weak, his senses dull, and his future dim. One day, a mysterious accident awakens the Eternal Origin Core, an ancient treasure buried deep within him. Along with the awakening comes a strange voice— the Origin System, a powerful system containing rewards, tasks, and an exchange store. From that moment, Billy’s life changes forever. He begins to meet people with hidden supernatural abilities, discovers dangerous underground societies, and learns that the world is far from ordinary. But the biggest twist comes when a strange pull drags him into another world entirely—a place where cultivation, magical bloodlines, and ancient clans rule everything. There, Billy realizes a shocking truth: He has lived once in that world before. And now, all the knowledge, instincts, and battle skills from his forgotten past life begin to awaken. With the system guiding him, Billy rises faster than anyone else. Those who once mocked him are forced to watch as he becomes a name that shakes both worlds.

Moyong Ha-jun was the "Shield of the Moyong," a warrior who conquered the Northern Wastes and silenced the Ghost King to elevate his clan to glory. But a dog that grows too strong makes its master tremble. Under the guise of a mission in the Death Forest, Ha-jun is poisoned by his disciple and ambushed by the very Shadow Guard he once trained. He fights like a demon, but ultimately falls to his cousin’s blade, his body dismembered and burned to ash to erase his existence. However, Ha-jun’s rage is too potent for death to contain. As his bones turn to dust, the "Great Swordmaster System" answers his call, rewinding the fabric of time. Ha-jun wakes up in his fifteen-year-old body, decades before his execution. He retains the memories of every technique, every traitor, and the searing pain of the fire. Armed with a System that rewards ruthless "Blood-Debts," Ha-jun begins a new path. He will not be the shield this time. He will be the sword at their throats, and he will burn the Moyong Clan down, its root and stem.

“Luck is not random. It's leverage.” Clay Holmes was the statistical average of mediocrity, a man adrift until a catastrophic, improbable car pile-up, a cosmic anomaly, forced his latent destiny to the surface. Clay survived, not by chance, but by becoming the latest inheritor of the King of War Cycle, a living engine of fate tasked with maintaining the precarious balance of chaos and order in the world. This ascension gifted Clay a terrifying, dual power set. First, Physiological Regression, which allows him to instantly read every historical weakness, old injury, and micro-shift in an opponent’s anatomy, turning every fight into a perfectly choreographed counter-attack rooted in past truth. Second, Probability Bias: the true power of a strategic genius. Clay doesn't need to be stronger or faster; he subtly manipulates every stray variable, a breath, a flicker of light, a loose floor tile, ensuring the 0.01% chance of victory becomes a 100% statistical inevitability. But his awakening triggers a devastating war with the man who came before him. The Predecessor, the former King of War who cracked under the psychological weight of the Debt and the Cycle's constant violence, has returned to finish his mission: end all probability. Convinced that random chance is the source of all human suffering and the guarantor of future devastation, the Predecessor seeks to obliterate the very concept of luck from the world. To stop the Predecessor, Clay must master his terrifying control over luck and anatomy, leading him back to the Nexus Point of his accident for a final, reality-bending confrontation. The stakes are total: if Clay fails, the world ends in rigid, predictable order. If he succeeds, he must transcend his humanity, merging with the combined knowledge of every King before him to become the Consciousness of Possibility, the ultimate defender of human potential.

Joseph Benjamin Carmen, also known as JBC or Unkillable, fused with infinite variants of himself, each representing different versions of his being across the multiverse. This fusion resulted in the creation of a prime version, possessing unimaginable power beyond comprehension. However, this newfound power came at a steep cost: the absorption of so many diverse counterparts triggered what is known as personality madness. To contain this madness and his limitless potential, JBC bears three mystical markings on his forehead, which serve to seal and suppress his powers. JBC is forcibly sent to an isekai world—the last of its kind—by a mysterious and powerful force he encountered after the fusion. In this strange new world, he must undergo a journey of self-discovery to control his ambitions, or risk unleashing chaos and destruction. As he explores this dimension, JBC notices significant changes in himself and his abilities, making him question his purpose. Will he rise as the protector of this new world, or will he become its greatest enemy? Author's Note: To learn about Unkillable's origin, refer to Beyond Dimensions: The Tales of Unkillable - Episode 4. The full story of his origin, along with those of his variants, will be revealed as the story unfolds.