Magical Theory (Harry Potter) FanFiction

The Eagle Queen

The Eagle Queen

G
Updated
13.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black, Sirius Black, Regulus Black & Sirius Black, Walburga Black, Orion Black, Arcturus Black III | Sirius Black's Grandfather, Regulus Black & Sirius Black & Original Female Character(s)
Tags
Bad Parent Walburga Black Black Family Drama (Harry Potter) Abusive Walburga Black Bad Parent Orion Black Black Family-centric (Harry Potter) Abusive Black Family (Harry Potter) Abusive Orion Black Orion Black Bashing Walburga Black Being an Asshole Magical Theory (Harry Potter)
Sirius has an older sister that doesn't have an immune system, this changes quite a few thingsNo story yet, just a list with an idea for an story, might make it an actual story
Manipulating Magic's Child

Manipulating Magic's Child

F/M
M/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Sirius Black/Severus Snape, Percy Weasley/Oliver Wood
Tags
Implied/Referenced Child Abuse Time Travel Severus Snape Lives Good Slytherins Pureblood Culture (Harry Potter) Pureblood Politics (Harry Potter) Magically Powerful Harry Potter Sirius Black Lives Book 6: Harry Potter and the Half-Blood Prince Time Travel Fix-It Pureblood Society (Harry Potter) Harry Potter is Lord of Multiple Noble Houses
When Harry willingly sacrificed himself for the sake of the Wizarding World as was expected of him, he never imagined for a second he'd wake up in a strange chamber surrounded by people both dead and alive.He certainly never expected Mother Magic her...
An Alternate Beginning

An Alternate Beginning

F/F
F/M
M/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Original Female Character(s), Harry Potter, Severus Snape, Draco Malfoy, Ron Weasley, Hermione Granger, Neville Longbottom, Albus Dumbledore, Rubeus Hagrid, Draco Malfoy & Harry Potter, Harry Potter & Ron Weasley, Weasley Family (Harry Potter),
Tags
Alternate Universe - Canon Divergence Not Canon Compliant Alternate Universe Hogwarts Hermione Granger is So Done Crushes Pureblood Culture (Harry Potter) Hogwarts First Year Remus Lupin is Harry Potter's Godparent Period-Typical Sexism Gender Roles Developing Friendships
“An Alternate Beginning” is the sequel to “An Alternate Introduction.” Which will follow the story of Harry Potter and his friends through the trials and tribulations of their first year at Hogwarts School of Witchcraft and Wizardry in a world colour...
Megalomania

Megalomania

Gen
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling Percy Jackson and the Olympians & Related Fandoms - All Media Types
Characters
Tom Riddle | Voldemort, Annabeth Chase (Percy Jackson)
Tags
Other Additional Tags to Be Added Self-Harm Reincarnation Asexual Character Animal Death no beta we die like voldemort Sane Tom Riddle Aromantic Character Magical Theory (Harry Potter) Aromantic Asexual Tom Riddle Tom Riddle-centric For Ritual Purposes
Tom Marvolo Riddle is born for the second (or the third or the ninth) time on December thirty-first, nineteen-ninety-three. He is born to a mother who, unlike his first mother, lives. He is born to a mother who, unlike his first mother, hates him....
A Study of Dark Thoughts

A Study of Dark Thoughts

F/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Tom Riddle | Voldemort, Tom Riddle/Original Female Character(s), Tom Riddle, Voldemort (Harry Potter), Abraxas Malfoy, Mulciber Sr. | Tom Riddle's Schoolmate, Antonin Dolohov, Druella Rosier Black, Nott Sr. (Harry Potter), Tom Riddle | Voldemort/Original Female Character(s), Avery Sr. | Tom Riddle's Schoolmate, Lestrange Sr. | Tom Riddle's Schoolmate,
Tags
First Wizarding War with Voldemort (Harry Potter) Pre-First Wizarding War with Voldemort (Harry Potter) Horcruxes Dark Magic Memories Witchcraft Fate & Destiny Obsessive Tom Riddle Tom Riddle is His Own Warning Prophecy Ancient Magic (Hogwarts Legacy) 1940s
Tom Riddle was no more.The darkness had enveloped him. Its tendrils curled around him, its claws digging into his flesh. Its presence fogged his judgement and mind, and it tore and slashed at his being, corrupting any semblance of humanity left in hi...
The Lunar Symphony of Storms (Lightning and Thunder)

The Lunar Symphony of Storms (Lightning and Thunder)

G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Sirius Black/Remus Lupin, Draco Malfoy/Harry Potter, Hermione Granger/Fred Weasley, Pansy Parkinson/Ron Weasley
Tags
Sort Of Magically Powerful Harry Potter slowburn Manipulative Albus Dumbledore The Noble and Most Ancient House of Black Wizarding Culture (Harry Potter) Magically Powerful Draco Malfoy Sane Bellatrix Black Lestrange Draco Malfoy Redemption Magical Theory (Harry Potter) Sirius Black Raises Harry Potter Regulus Black Redemption
He had no name, he made no sound, and he was never seen by any. He, who is unlike all other kids who were called and loved and remembered, had no use for a name.Harry Potter wasn't a name he had heard before, and the faces of the Potter family weren'...
Home Truths

Home Truths

M/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Original Characters, Harry Potter, Draco Malfoy/Harry Potter, Draco Malfoy, Ron Weasley, Hermione Granger, Astoria Greengrass, Blaise Zabini, Andromeda Black Tonks, Theodore Nott, Pansy Parkinson, Percy Weasley,
Tags
Hand Jobs Blow Jobs Slow Burn Anal Sex Explicit Sexual Content Drinking Drunkenness Drug Use Mental Health Issues Implied/Referenced Homophobia Harry Potter Epilogue What Epilogue | EWE Racism
En la temporada baja, Harry decidió arreglar Grimmauld Place y descubrió que Draco Malfoy era la única persona que podía ayudarlo. Una carrera exigente y un escrutinio implacable de la prensa fueron suficientes para que Harry añadiera a la mezcla una...
Alexithymia

Alexithymia

Gen
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling Alien Stage (Web Series)
Characters
Harry Potter, Rubeus Hagrid, Ivan (Alien Stage), Garrick Ollivander
Tags
Other Additional Tags to Be Added Reincarnation Historical Inaccuracy Past Character Death Magical Theory (Harry Potter) Wandlore (Harry Potter) this is not well researched or well planned lmao (this is how i cope) in case u haven't caught on yet: ivan is reincarnated as harry potter no beta we die like half the alien stage cast (but not Ivan bc he’s alive trust me)
Ivan has spent his life being the obedient pet. He thinks his final act of defiance should make up for it. Waking up in an infant body, in a world where Earth is still whole, is disorienting. Discovering magic? World-shattering.And yet, even as his l...
sons of asclepieia

sons of asclepieia

Gen
M/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Harry Potter, Severus Snape, Tom Riddle | Voldemort, Albus Dumbledore, Abraxas Malfoy, Harry Potter/Tom Riddle | Voldemort, Harry Potter/Other(s), Malfoy Family (Harry Potter)
Tags
Power Imbalance POV Third Person Limited Minor Character Death Alternate Universe - Historical Wizarding World (Harry Potter) Mentor/Protégé Work In Progress POV Alternating Blood Magic Sexual Slavery Slavery Magical Theory (Harry Potter)
Tom Riddle, by invitation of his old friend the Proconsul of Thera, Abraxas Malfoy, travels to the small Island that he governs in the middle of the Mediterranean. Tom is there to research lost rituals of the region, rumoured to be steeped in blood s...
idiosyncrasies

idiosyncrasies

F/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Hermione Granger, Tom Riddle | Voldemort, Tom Riddle, Hermione Granger/Tom Riddle, Hermione Granger/Tom Riddle | Voldemort
Tags
Time Travel or something Magical Theory (Harry Potter)
Riddle’s smile remained. “All I want is for you to be honest with me,” he said smoothly, his tone calm, almost... affectionate. “You’re playing a game, Hermione, but you’re not very good at it.” He leaned in slightly. “I know you’re not a spy. You’re...
Anakephalaiosis

Anakephalaiosis

M/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black/James Potter, Regulus Black, Harry Potter, Remus Lupin, Sirius Black, James Potter, Barty Crouch Jr.
Tags
Time Skips Time Travel Alpha/Beta/Omega Dynamics Accidental Baby Acquisition Angst and Humor Mystery Racism Implied Mpreg Kid Fic Fae & Fairies Sirius Black & James Potter Friendship Apathy
Regulus wakes up in his dorm with a baby sleeping on his chest. He has no idea where it came from, and it's up to him to figure it out.
Sunny Suzuki and the Stupid Traitorous Rat

Sunny Suzuki and the Stupid Traitorous Rat

Gen
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling OMORI (Video Game)
Characters
Original Characters, Remus Lupin, Albus Dumbledore, Luna Lovegood, Hermione Granger & Harry Potter & Ron Weasley, Harry Potter & Sunny (OMORI), Hermione Granger & Harry Potter & Sunny (OMORI) & Ron Weasley, more dynamics that would take too long too tag- check character tags see some of the relevant people, Mentioned Aubrey and Basil and Hero and Kel and Mari
Tags
Fluff and Humor Angst and Hurt/Comfort Found Family Unreliable Narrator POV Multiple Character Development Isekai and Transmigration Enemies to Friends Canon-Typical OMORI Warnings Existentialism No character bashing Magical Theory (Harry Potter)
When Sunny trips down the stairs and spirals to the floor, he thinks he's dead. But instead of hitting the ground and crumbling from gravity, he passes right through the wood, right through his own world, and wakes up in a new one, in his 13-year-old...
For Oblivion is Written in the Laws of Men

For Oblivion is Written in the Laws of Men

Gen
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Harry Potter, Hermione Granger, Astoria Greengrass, Fred Weasley, George Weasley, Daphne Greengrass, Bathilda Bagshot
Tags
Alternate Universe - Canon Divergence Hogwarts Alchemy Slytherin Harry Potter Magically Powerful Harry Potter Alternate Universe - Harry Potter Setting Smart Harry Potter Potions Hogwarts Fifth Year Harry Potter-centric Harry Potter is Not the Boy-Who-Lived History of Magic Class (Harry Potter)
Quiet, unassuming, seldom seen, Harry Potter seems just an ordinary Slytherin. Besides the fact that he's the smartest in the class, nobody knows anything about him. Yet Potter is more than it seems.
Crystal Potential

Crystal Potential

Multi
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Original Characters, Original Female Character(s), Harry Potter, James Potter, Lily Evans Potter, Original Potter Family Characters (Harry Potter), Original Character(s) & Original Character(s), Harry Potter & Original Character(s)
Tags
Alternate Universe - Canon Divergence Magic Elemental Magic Manipulative Albus Dumbledore Harry Potter Has a Twin James Potter & Lily Evans Potter Live Magical Theory (Harry Potter) Girl-Who-Lived (Harry Potter) Harry Potter Never Went to Hogwarts Magically Powerful Original Character(s) But its his sister
The night Voldemort fell, the world only saw one survivor. The other was meant to disappear. Miruna Potter has spent her life in the background, her magic caged, her name unspoken. But power does not stay hidden forever, and neither do forgotten chil...
dragon in the china shop of self-perception

dragon in the china shop of self-perception

M/M
G
Updated
17.04.2025
Fandom
Harry Potter - J. K. Rowling Adventurers Wanted Series - M. L. Forman
Characters
Harry Potter, Remus Lupin, Sirius Black, Severus Snape, Ron Weasley, Hermione Granger, Ginny Weasley, Molly Weasley, Fred Weasley, George Weasley, Dolores Umbridge, Albus Dumbledore,
Tags
Slow Burn Kinda Albus Dumbledore Bashing The Ministry of Magic is Corrupt (Harry Potter) Molly Weasley Bashing Gringotts Wizarding Bank Good Friend Luna Lovegood Number Twelve Grimmauld Place Care of Magical Creatures Brownies Severus Snape Bashing Prejudice Against Slytherins
Alex has been kidnapped into the Wizarding World. Well, kidnapped might be a strong word - he went with them semi-willingly. Unfortunately for him, he doesn't have choice about staying in this mostly-foreign society. Might as well make the best of it...
Forsaking Magic's Child

Forsaking Magic's Child

M/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Sirius Black/Severus Snape, Percy Weasley/Oliver Wood
Tags
Implied/Referenced Child Abuse Time Travel Severus Snape Lives Good Slytherins Pureblood Culture (Harry Potter) Pureblood Politics (Harry Potter) Magically Powerful Harry Potter Sirius Black Lives Time Travel Fix-It Complete Pureblood Society (Harry Potter) Harry Potter is Lord of Multiple Noble Houses
When Harry willingly sacrificed himself for the sake of the Wizarding World as was expected of him, he never imagined for a second he'd wake up in a strange chamber surrounded by people both dead and alive.He certainly never expected Mother Magic her...
A Dire Situation

A Dire Situation

Gen
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling Naruto (Anime & Manga)
Characters
Harry Potter, Remus Lupin, Sirius Black, Ron Weasley, Hermione Granger, Hatake Kakashi, No one yet, but it will be - Relationship, Sirius Black & Hatake Kakashi
Tags
Time Travel Tags May Change Dimension Travel Animagus Shapeshifting No character bashing Magical Theory (Harry Potter) Chakra Theory (Naruto) that part's less important than you think dire wolf Dog Hatake Kakashi
Kakashi - due to a bad combo of nature chakra, maybe gods, Uzumaki seals, and the Sharingan - is not in the right dimension.Or time period.Or body.Stuck in the shape of the magical Dire Wolf, Kakashi will have to find a way home by himself.
Question everything, assume nothing

Question everything, assume nothing

F/M
M/M
Multi
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black/James Potter, Harry Potter, Remus Lupin, Sirius Black, Severus Snape, Fred Weasley, George Weasley, Albus Dumbledore, Arcturus Black III | Sirius Black's Grandfather, Arcturus Black III | Sirius Black's Grandfather & Harry Potter, Harry Potter & Fred Weasley & George Weasley, Harry Potter & Dorian Potter (OC),
Tags
Pureblood Society (Harry Potter) Smart Harry Potter Harry Potter Has a Different Name Magic and Science Regulus Black is Harry Potter's Parent Alternate Hogwarts House Sorting Harry Potter Has a Sibling Magical Theory (Harry Potter) Harry Potter is a Member of the House of Black
Hydrus Black, formerly known as Harry Potter, the brother of the boy who lived, had a motto in life he always followed "Question everythin, assume nothing". Thrown into a world of magic he tries to make sense of it all, thrown into a world of politic...
The Myth of Innocence

The Myth of Innocence

G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Original Characters, Harry Potter, Sirius Black, Hermione Granger, Hedwig (Harry Potter), Death (Harry Potter), Fate - Character
Tags
Pureblood Politics (Harry Potter) Magically Powerful Harry Potter Alternate Universe - Harry Potter Setting Smart Harry Potter The Noble and Most Ancient House of Black Harry Potter is Heir to Multiple Noble Houses Morally Grey Harry Potter Wizarding Culture (Harry Potter) Wizarding Politics (Harry Potter) Harry Potter is the Heir to the House of Potter Magical Theory (Harry Potter)
The personifications of the gods that make up slithers of Divinity watch their plans immediately go askew in the aftermath of tradgedy. With little ability to rectify or influence the situation Fortune gives Harry Potter a small gift in the hopes it...
A Muggleborn's Quest for Power, Knowledge and Magic

A Muggleborn's Quest for Power, Knowledge and Magic

G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Minerva McGonagall, Bill Weasley, Albus Dumbledore, Filius Flitwick, OC - Character, Griselda Marchbanks
Tags
Dark Magic Pureblood Culture (Harry Potter) Pureblood Society (Harry Potter) Dark Magic Rituals (Harry Potter) Magical Theory (Harry Potter)