1 - 20 of 97 Works in The Undercroft (Hogwarts Legacy)
Navigation
Listing Works
-
Tags
Summary
A storm of snowflakes blows from the pale dawn sky through the gap, as white as ivory bone. A steady drip-drip-drip punctuates the last swirling of the runes. With blood and snow puddling on the floor, Severina Snape takes her last shuddering breath in the dreary pale dawn.
SI-fem!Snape, Time-Travel.
Series
- Part 1 of The Dead Have No Need of Umbrellas
-
Tags
Summary
She's not supposed to be here-not this late, not this loud, and definitely not in Gryffindor.
The Crouch family is ancient, noble, and obsessed with tradition.
Emily? Not so much.
She arrives at Hogwarts four years behind, cloaked in secrets and wielding a mysterious magic no one understands. From sneaking into the Forbidden Forest to chasing chaos with a more haunted Professor Fig, Emily is anything but a typical Crouch.
She's a rule-breaker, a people-pleaser, and-worst of all-a Gryffindor.
---
A Hogwarts Legacy retelling that deepens familiar characters, sharpens the stakes, and reimagines the story through the eyes of someone who was never supposed to be part of it.
Series
- Part 1 of Of Privileged Blood
-
A guide to pleasure by sosleepy
Fandoms: Hogwarts Legacy (Video Game), Harry Potter - J. K. Rowling
03 Oct 2025
Tags
Summary
Acacia travels down to the restricted section to find some smutty muggle literature. Sebastian catches her reading it in the undercroft...
-
History was doomed to repeat itself. by RavenMikaelsonAddams1989
Fandoms: Harry Potter - J. K. Rowling
19 Sep 2025
Tags
Summary
Who would think that history is doomed to repeat itself?
A member of the House of Black, sorted into Gryffindor. Escaping to be with those he considers family.
Years later, a member of the Potter house was sorted into Slytherin. And abandoned by those who are his family, he follows in his godfather's footsteps, escaping.
"You said it yourself, Henry, your brother is dead."
"But"
"No"
-
Of Tethered Shadows: Ancient and Unforgivable by merlinkiliemrys
Fandoms: Hogwarts Legacy (Video Game), Harry Potter - J. K. Rowling
17 Sep 2025
Tags
Summary
"Magic comes with a price."
In the Fall of 1890, three hearts are entwined by a dark fate forged from the unforgivable shadows. Before her seventeenth birthday, Lucy Bellamy discovers she has ancient magical powers. Upon receiving a letter from a school named Hogwarts, a professor named Eleazar Fig takes Lucy under his wing as a newcomer sixth-year in the Hufflepuff house. Upon arriving at her new school, she attracts the attention of the Slytherin house students, Sebastian Sallow and Ominis Gaunt. She was the light they both craved and now torn between two hearts and a bond she never asked for, she must choose between the boy who knows her soul and the one who shares her darkness- before the darkness consumes them all. As love and loyalty clash, the line between hero and villain blurs and it will cost them everything.
A Hogwarts Legacy Trilogy of The Shadow Trio
Of Tethered Shadows
Part One: Ancient and Unforgivable
-
Tags
Summary
Hypatia se sintió muy confundida cuando un anciano se apareció en su puerta para comunicarle que era una bruja. ¡Que extraño! Sus registros habían sido borrados de la base del ministerio y nadie sabía de su existencia hasta ahora. Además, estaba este chico Sebastian Sallow y su aura dorada. Luego aparecía un amigo suyo, Ominis Gaunt, callado pero imponente. Para coronar, ella poseía magia antigua, un poder desconocido incluso para los más viejos. ¿De qué se trataba todo aquello?
o
Vamos a celebrar el poliamor con romance lento y sexo eventual.
-
The Unabridged Diary of Ominis Gaunt by cloniccouer
Fandoms: Hogwarts Legacy (Video Game)
15 Sep 2025
Tags
Summary
If you picked this up in search of scandal, heroics, or the sort of high drama that leaves readers breathless, do yourself a favor and put it right back down. You've gravely overestimated both the contents and their author.
Still here? I have to ask: are you missing a chromosome, or simply a glutton for disappointment?
You'll find no insight into the grand mysteries of Hogwarts here, you know. Merely a catalogue of the everyday, recorded by one whose chief contribution to the school is not bumping (too often) into the furniture.
If this somehow still qualifies as a page turner, by all means, proceed. I suppose I can't actually stop you.
But Sebastian, if you're reading this, do have the decency to refrain from scrawling in the margins. I fear the world is not yet ready for the annotated edition.
-
Love and Potions: Fifth Year by ShayRiddle
Fandoms: Harry Potter - J. K. Rowling, Hogwarts Legacy (Video Game), Harry Potter - Fandom
15 Sep 2025
Tags
Summary
A Tom Riddle X Y/N story.
Y/N is a Slytherin. Close friends with Mattheo Riddle, the son of Voldemort and Bellatrix Lestrange. She's academic and ambitious but just can't seem to wrap her head around Potions. Ahead of her Potions O.W.L, Tom Riddle the second (Mattheo's older brother) is assigned as her tutor. How can she not develop a crush on the enigmatic, charismatic and handsome Tom? But will it ever be mutual? 👀
As she progresses through Fifth Year, Y/N starts to become unwell and her magic suffers and changes. What's happening to her and will she be able to handle the truth as it unravels?
What will Lord Voldemort's return mean for Mattheo, Tom and their adopted family, The Malfoys? Will the Slytherin gangs friendships survive his return, teenage angst and everyone falling in and out of love? What will become of the Legacy of the Keepers and of Lord Voldemort?
Series
- Part 1 of Love, Potions and Legacies
-
Cursed by lunawinchester101
Fandoms: Hogwarts Legacy (Video Game), Sebastian Sallow - Fandom, hogwarts - Fandom
01 Sep 2025
Tags
Summary
Y/n X Sebastian Sallow
Starting as a new student in sixth year at Hogwarts isn't easy, specially if you're coming from a whole different continent. Y/n Draven just transferred from Europe to Hogwarts, since her father's job required them moving to London. During the first few days of her stay at the school, she'll meet many different people. But it is one of the students who will turn her entire world upside down. Will she risk it all for the boy who could see thestrals?
-
Who is Eirian Orion Riddle? by RavenMikaelsonAddams1989
Fandoms: Harry Potter - J. K. Rowling
31 Aug 2025
Tags
Summary
After Cedric's death, Harry was barely recovering: he couldn't eat or sleep, and the after-effects of the Cruciatus Curse were still plaguing him.
He just wanted to have a summer, at least a peaceful one, without thinking about magic. But, as expected, that wasn't to be the case. It didn't help that there was a snake following him everywhere. -
Sunlight's Resilience by shiningsunset
Fandoms: Hogwarts Legacy (Video Game), Harry Potter - J. K. Rowling
23 Aug 2025
Tags
Summary
All Adelia Asa Rosewater wants is to live peacefully with her family, but that's no longer possible.
Now that her magic has awoken at the age of 15, she's whisked away to Hogwarts, testing her ability to learn magic, both regular and ancient, and make friends for the first time in several years.
When her new friend Sebastian Sallow asks her to help cure his sister, she's willing to give him all the information she has gathered over the years from taking care of her ailing mother.
But what happens when she realizes that her connection to the infamous Rookwood goes deeper than she initially understands? Will she still be able to help Anne, when the price for her cure could be the cost of her own freedom?
[*Funky little fic ft. plenty of jokes & pretty artwork*]
Act 1: Chapters 1-20
Act 2: Chapters 21-? -
Underglow by strawberryuniverse
Fandoms: Harry Potter - J. K. Rowling, Hogwarts Legacy (Video Game)
16 Aug 2025
Tags
Summary
This is an AU branching off from Afterglow because even I have limits on how much yearning I can inflict before I snap and give the people what they want. Morwenna follows Sebastian; everyone's happy, sort of. (except maybe Garreth) Can be read standalone, but the emotional payoff definitely hits different when you've suffered through 38 chapters of the main timeline first. 💙
-
In the Shadow of the Unforgivable by magicatherwrenegade
Fandoms: Sebastian Sallow - Fandom, Hogwarts Legacy (Video Game), Ominis Gaunt - Fandom
09 Aug 2025
Tags
Summary
It has been eleven years since the Goblin uprising led by Ranrok and Victor Rookwood. Eleven years since the discovery of the final repository and Faustine Stolas' rise to status of Keeper. Eleven years since she turned in her best friend Sebastian Sallow for the murder of his uncle. Faustine has been appointed new Defense Against the Dark Arts professor. Joining Ominis Gaunt as a professor at Hogwarts School of Witchcraft and Wizardry. At the start of the new year, she is nervous and wary yet excited to go back to her alma mater to teach the next generation of witches, wizards, and magicians. Until, Sebastian Sallow makes his prompt return at Hogwarts after over ten years in Azkaban as the other Defense Against the Dark Arts professor. Faustine will have to maintain her professionality when working together with the boy-turned-man she once sent off to face the consequences of his actions. A new dawn rises at Hogwarts School for Wizardry, overshadowed by the unforgivable and inescapable throes of the past. Can the trio overcome what was and find their way back to each other? And can Sebastian leave the past in the past, even when Anne may still be alive?
-
Tags
Summary
Two students. One forbidden spell.
A bond neither of them meant to create, and no clear way to break it. The connection deepens in time - shared glances, mirrored aches, emotions they try to dismiss. But the harder they try to tolerate it, the more impossible it becomes.
They weren't meant to carry each other like this, but maybe some things aren't meant to be undone.
-
unsex me here by ohmerlin (TheLadyofShalott1989)
Fandoms: Hogwarts Legacy (Video Game), Harry Potter - J. K. Rowling
30 Jul 2025
Tags
Summary
He summoned me. I came, but not to appease him. Let him choke on his mistake.
-
Blood That Remembers by Mirime_R_Lenalee (Mirime16)
Fandoms: Harry Potter - J. K. Rowling, Hogwarts Legacy (Video Game)
28 Jul 2025
Tags
Summary
She did not arrive with a prophecy.
No name etched in legend,
no wand to answer her call.
Only silence —
and the weight of something ancient humming beneath her skin.The castle remembers.
Its stones stir when she walks.
And someone — quiet, unseen — begins to listen.Some legacies sleep.
Others wake when called by blood.Series
- Part 1 of Blood That Remembers: A Legacy Rewritten
-
A Covenant Between Souls || Hogwarts Legacy by Rosewood_Cafe
Fandoms: Hogwarts Legacy (Video Game), Harry Potter - J. K. Rowling
27 Jul 2025
Tags
Summary
History has been rewritten.
The truth is unknown.
Power is the only constant in this cruel world.This is loosely related to Hogwarts Legacy, using its characters.
-
The Devil's Advocate by ladyelisabeth
Fandoms: Hogwarts Legacy (Video Game), Harry Potter - J. K. Rowling
14 Jul 2025
Tags
Summary
The night after the new fifth-year’s foray into the Restricted Section, Professor Fig is nowhere to be found. So, intent on finding answers, Vera Webb decides to confide in the boy who took the fall for her, choosing to ignore the warnings she’s received about his dark past and questionable character. After all, Vera has spent her life in the shadow of dangerous men, and she’s sure that Sebastian isn’t one of them.
Besides, she has her own dark secrets to hide. She knows what it feels like to be desperate to escape the mistakes of the past and powerless to protect those you love.
Their partnership quickly spirals into far more than she bargained for, and Vera finds herself inextricably and irresistibly entangled with this boy who just wants to save the only family he has left. No matter how far down the road to hell he may lead her, she'll be damned before she lets him go alone. The only question is how high of a price she'll have to pay before all is said and done.
-
My Dearest Secret by LadyElspeth
Fandoms: Hogwarts Legacy (Video Game), Harry Potter - J. K. Rowling
13 Jul 2025
Tags
Summary
Beyond furious, Ominis Gaunt cornered Sebastian Sallow the night after the "In the Shadow of the Undercroft" quest.
Series
- Part 10 of Hogwarts era: Sebinis one-shots
-
Tags
Summary
Here is a collection of all my Sebastian Sallow OneShots. Most are NSFW 18+ content, which will be marked with ✮