"Her name will not be Lyanna. Nor Joanna." her husband declared. "No, her name is Ingrid." Born as lightning lit up the birthing room, she would grow up learning the game and eventually, making her plays. She would not be forgotten, no, she would forever be remembered as the Queen of Storms. Crosspostes on my ao3 account!

In which the group from the past watch how their decisions changed the future. [Book 1- Part 1:Philosopher Stone] [Book 1- Part 2: Lightning Thief] [Book 1- Part 3: Chamber of Secrets] [Book 1- Part 4: Sea of Monsters] [Book 1- Part 5: Prisoner of Azkaban] [The(a) Universe part 1] [Irregular updates] I do not own Harry Potter or Percy Jackson. All rights for the characters go to J.K Rowling and Rick Riordan. I own my OCs and the altered storyline. Disclaimer: this story contains themes related to LGBTQ+ so if you have any problem with that, i would recommend not reading the book instead of potentially spreading hate.

The war was going badly. Hope wore thin, worn down by funerals and betrayals. And Hermione Granger was tired of watching the people she loved die. So she turned to something older than wand magic. Something forbidden. Buried in the bowels of the Black Family Library, there it was: Vinculum Sanguinis. Blood magic-raw, binding, and irreversible. She wasn't summoning a spirit. She was summoning a soul. Regulus Arcturus Black: traitor to Voldemort, presumed dead, drowned by his own mission. The ritual was agony. It called for a drop of her blood, a binding vow, and a name spoken with intent. She gave more than a drop. When the circle of runes lit up with searing gold, and the air crackled like a storm breaking, Regulus appeared-naked, furious, and alive. "You called me," he said. His voice was low and sharp, like a blade drawn in the dark. Hermione collapsed, the toll of the ritual stealing her breath. "We're bound. Soul to soul. You're mine now." His eyes-those same steel-gray Black eyes-narrowed. "And you are mine." Regulus learned quickly. He was colder than Sirius, quieter. But once he understood what had become of the world-what Voldemort had turned into-he didn't hesitate. "We end this," he told her one night. "Not for the Order. Not for Potter. For family." He moved through the shadows. Undetected. Whispers of a third side rose. The war paused. Every living Black turned to him. Even the cursed ones. Even Draco. He didn't speak. He didn't need to. His presence said enough. They followed. He wasn't there for sides. He was there for blood. And anyone threatening Hermione Granger was already marked for death.

The Potters have a set of twins, a boy, the son of James, and a daughter that's not James's but Poseidon's. Poseidon possessed James when they were conceived. the story takes place in the original harry potter time line. Harry Potter and Percy Jackson are the same person. After Voldemort attacks the Potters, their son Jamie is hailed as the boy who lived when actually it's Poseidon's daughter, Andromeda, who goes by Andi. The Potters neglected her for the next year when Poseidon steps in and takes her. he takes her to a Witch named Sally Jackson. Shortly after the goddess Artemis was made an Olympian, a prophecy was given that foretold of a Demigod daughter of Poseidon, and that they would be soulmates. Artemis still makes her vow to remain a virgin, but with the loop whole that she would be able to break the vow when she met her soulmate. Four thousand years later, Artemis had almost lost hope of ever meeting her. When the big three swore on the Styx to never have kids again, she loses all hope. That is until about 35 years later when Andromeda was born. The Lightning thief and Sea of monsters pretty much stay the same with some minor tweaks. it's when we get to the Titans curse that the big changes happen in the timeline. I don't know how to incorporate any of the Harry Potter books just yet, only because Andi never went to Hogwarts. All rights belong to Rick Riordan and J.K. Rowling. I do not own either series

ᴏɴᴇ ғᴀᴛᴇғᴜʟ ᴅᴀʏ, ᴛᴡᴏ ɢᴏᴅs 𝐅𝐀𝐋𝐋 ғᴏʀ ʟᴏᴠᴇʟʏ ᴘʀɪɴᴄᴇ ᴀɴᴅ ʜᴇ ᴄʜᴏᴏsᴇ ᴛʜᴇ 𝐒𝐔𝐍, ʟᴇᴀᴠɪɴɢ ᴛʜᴇ 𝐖𝐈𝐍𝐃 ʜᴇᴀʀᴛʙʀᴏᴋᴇɴ. ᴀɴᴅ ᴏɴᴇ ʜᴏʀʀɪʙʟᴇ ᴅᴀʏ, ᴛʜᴇ sᴀᴍᴇ ʟᴏᴠᴇʟʏ ᴘʀɪɴᴄᴇ ᴅɪᴇᴅ ғʀᴏᴍ ᴀɴ ᴀᴄᴄɪᴅᴇɴᴛ ᴀɴᴅ ʜᴀᴠᴇ ʙᴇᴇɴ 𝐑𝐄𝐈𝐍𝐂𝐀𝐑𝐍𝐀𝐓𝐄 ᴀs ᴀ 𝐅𝐋𝐎𝐖𝐄𝐑. 𝐈𝐍 𝐖𝐇𝐈𝐂𝐇 ᴛʜᴇ ɢʀᴇᴇᴋ ʜᴀʟғ-ɢᴏᴅs ᴀɴᴅ ɢᴏᴅs ᴀʀᴇ ɢᴏɪɴɢ ᴛᴏ ᴡᴀᴛᴄʜ ᴛʜᴇ ʟɪғᴇ ᴏғ 𝐇𝐘𝐀𝐂𝐈𝐍𝐓𝐇 𝐏𝐎𝐓𝐓𝐄𝐑, ᴀʟᴏɴɢ sɪᴅᴇ ᴛʜᴇ ᴡɪᴢᴀʀᴅ ᴡᴏʀʟᴅ. 𝐖𝐀𝐓𝐂𝐇 𝐓𝐇𝐄 𝐌𝐎𝐕𝐈𝐄𝐒 ( female harry x apollo ) written by cold_introvert

In a world shaped by prophecy, Hazel Lilly Potter was never meant to matter. She wasn't the Chosen One. She was the twin sister in the background - quiet, overlooked, surviving in the shadow of her brother's fame. But when the Goblet of Fire spits out her name instead of Harry's, Hazel is thrust into a deadly tournament she never wanted, with no allies, no answers... and no way out. Desperate to survive, she turns to an ancient book of forbidden magic - and unknowingly summons Regulus Black from beyond the Veil. Not just as a ghost, but as something more: bound to her by magic, tethered by fate. As Hazel trains under his guidance, a deep connection grows between them - one that defies death, war, and the roles others have written for them. Together, they uncover the truth behind the Triwizard Tournament, the return of Voldemort, and the fractured choices of the Order. But power always demands a cost, and Hazel must decide what she's willing to risk to forge a new path - one that answers to neither Dumbledore nor the Dark Lord. A path built not on prophecy... ...but on choice.

Amarielle James has always been different-feared and misunderstood by the muggle orphans around her for her silver hair, emerald eyes, and the strange magic that flares around her. From a young age, only two companions truly understood her: Hades, her cunning and mischievous Maine Coon familiar, and Tom, a dangerously brilliant boy two years her senior who has watched over her since she was four. From childhood, his obsession with her was fierce, protective, and unrelenting. As they grow, the world's dark undercurrents creep closer. Amarielle discovers her true identity as the heir of Merlin and second heir to Salazar Slytherin, a revelation that awakens powers even she struggles to control. Bound by blood, magic, and unspoken desire, Amarielle, Tom, and Hades navigate a world of obsession, ancient secrets, and rivalries that stretch across generations. But when Grindelwald, drawn by whispers of Merlin's heir, begins to close in, Amarielle must confront the deadly cost of her power, the weight of her destiny, and the perilous intensity of those who love her most.

After a forbidden night with Ser Criston Cole, Princess Rhaenyra Targaryen is forced by her father, King Viserys, to drink the moon tea and protect her honor. To shield her image further, she weds Ser Laenor Velaryon, and together they move to Driftmark. Yet seven moons later, Rhaenyra gives birth to a daughter whose true parentage would ignite scandal across the realm. To safeguard her claim to the Iron Throne, she makes a heartbreaking choice - she surrenders her firstborn and buries the secret deep within her heart. That child, carried across worlds by fate and fire, finds herself in England, adopted by a wizarding couple who longed for a child of their own. Named Dahlia Aemma Potter, she grows into a girl of unusual magic and unshakable courage. But whispers of prophecy cling to her like shadows, and the truth of her bloodline threatens to unravel the balance of two worlds. Between dragonfire and wizardry, Dahlia must discover who she is - and decide whether to claim the destiny written in her blood or forge one of her own.

In a world still trembling from war and ruled by legacy, one girl slips between the cracks of history to change everything. Lyra Druella Black - the last free heir of the House of Black - was hidden, erased, forgotten. Born in shadow. Raised in silence. But as the world prepares for another war shaped by two men-Voldemort and Dumbledore-Lyra forges a third path: her own. While the wizarding world chooses sides, Lyra chooses family. She rescues Draco from indoctrination, claims Harry as her kin through Sirius' hidden will, restores her broken aunts, and dares to bring even Bellatrix back from madness. As she uncovers Dumbledore's buried crimes and topples Voldemort's dark empire from the inside, Lyra doesn't seek a throne-she builds a home. Rewriting bloodlines, rebuilding legacies, and refusing to be used by anyone, Lyra Black will not be another sacrifice. Because Black blood does not break. It rebuilds.

My take on a harry goes back to fix things fic. When Harry accidentally breaks his wand he is engulfed in Phoenix flames and finds himself back in olivander's when he first bounded with his wand. armed with the knowledge of the future how can harry change things for a better tomorrow?