Academy Fanfiction Fantasy Mystery

Harry Potter: Heir of Darkness

Name: Harry Potter: Heir of Darkness
Rating: 4.7 (1 reviews)
Author: SlyOW

SlyOW

4.7 Rating

Hiatus Status

105.5k Views

Start Reading

Synopsis

Magic is wondrous, and Ethan well intends on exploring everything it has to offer, even if he has to attend a dangerous school inhabited by giant, child eating snakes, and targeted by a semi-immortal Dark Lord. Unfortunately, things are not so simple as the world is a whole lot larger than he first thought, and to add to that, he is the grandson of the Dark Lord who terrorized the entire world half a century ago. Well, at least he can count on his knowledge of the plot, right?

Right?

—————————–

To read up to 15 chapters ahead: https://www.patreon.com/SlyOW

Books similar to Harry Potter: Heir of Darkness

The Fox Hole

★ 4.5

Starwaves

What do you do when you're reborn as the son of Yasaka? Open a restaurant of course!

Harry Potter and the Surprisingly Competent History of Magic Professor

★ 4.8

TheFanficGOD

Cassian Rosier is a failure. A near-Squib in one of the Sacred Twenty-Eight families, he’s spent his life as the family’s punching bag... mocked, dismissed, and barely tolerated. But when a simple light spell becomes his last chance to prove himself, Cassian’s world shatters in a way none of them could have imagined.

Because the Cassian they knew? He is gone. In his place is a man from another world... our world. A man with no magic but a lifetime of teaching behind him, and only the vaguest memories of a “Harry Potter” series he never bothered to read or watch. Suddenly trapped in a body with a ruined reputation and no real power, the new Cassian has one goal... to survive.

When forced to give a lecture on magic, Cassian bluffs his way through by teaching Lumos... a spell he doesn’t know. But something strange happens. As hundreds of people learns from his lecture, mastery floods his mind. And then it happens again, an ancient variation of Lumos awakens, along with memories that don’t belong to him.

Some memories are benign, illuminating secrets of long-forgotten magic. Others are sharp, dark, and dangerous... leaving him to wonder whether he is drawing on wisdom or inviting something far worse into himself.

Now sent to Hogwarts as a professor, Cassian must juggle the expectations of his pureblood family, the suspicion of fellow teachers, and his own growing power. Every spell he teaches brings him closer to mastery... and to the ancient past that might consume him.

A snarky, slow-burn power fantasy about an accidental professor who teaches magic too well, unlocks spells no one remembers, and juggles ancient memories, family politics, and students who might be the end of him.

What to Expect

-Light-hearted, snarky tone (Cassian’s dry humor carries the story).

A reluctant but clever MC navigating Hogwarts, pureblood politics, and ancient magic.

Progression fantasy elements: teaching magic makes Cassian stronger over time.

Ancient spells come with lingering memories—some helpful, others unsettling.

A competent teacher MC (no “bumbling fool” energy here, but plenty of witty one-liners).

Slow-burn romance with a single female lead (Bathsheda Babbling).

Exploration of Hogwarts daily life from a professor’s POV, with banter, levity, and political scheming.

Content Warnings

Mild swearing (Cassian has opinions and isn’t shy about sharing them).

Family dysfunction and emotional manipulation (Rosiers gonna Rosier).

Canon-typical prejudices (pureblood vs Muggle-born ideology), handled critically.

Occasional darker themes tied to ancient spell memories.

Slow-burn romance, no harem.

No gratuitous gore or smut.

Warning: May contain dangerous levels of sarcasm, accidental teaching competence, and the occasional romantic subplot you never signed up for. Proceed with tea.

The Professor from Azkaban

★ 5.0

NaughtyPanda253

His first memory of magic was his father torturing his mother.
His last memory of Hogwarts was expulsion.

His years in Azkaban should have destroyed him — but instead, they remade him.

Now Sagrace Greengrass returns to Hogwarts as a professor, carrying the calm of a man who survived both family and hell.

The question isn’t what he’s teaching.
It’s what he’s planning.

Harry Potter: Westeros’s Plant Life

★ 4.7

IamLuis

Adrian Westeros transmigrated to the world of Harry Potter and gets a cheat ability that allows the plants he grows plants to Mutate and gain a characteristic. After graduation, he spends years traveling to remote corners of the wizarding world, using his cheat ability and creating a collection of extraordinary botanical plants and when he returned to Magical Britain he unexpectedly got the offer to become a Professor at Hogwarts School.
################
You can read more chapters on: patreon.com/IamLuis

Harry Potter: Bloodraven

★ 4.6

RyanFic

A teenage boy finds himself transmigrated into an alternate version of his favorite fictional universe, equipped with a standard system designed to make his adventure more convenient.

—

In this fanfiction, the wizarding world is more advanced and more aware of Muggle technology. The one place still lagging behind? Britain, where noble wizards cling to outdated traditions.

This is an alternate-universe take on Harry Potter, blending in characters, themes, and ideas from various other universes—movies, TV shows, and books alike.

The story will begin by focusing on Harry's time at Hogwarts, with other universes making brief appearances through short chapters or mentions. They won't take center stage until after the Hogwarts years are complete.

The pace will be slow at the beginning, as I need to introduce new concepts, world-building, and character development to shape the MC the way I want him before the plot truly kicks off.

—

The System:

First of all, it doesn't control the MC's life.

It's not sentient, it doesn't make decisions, and it certainly doesn't control the MC. In fact, the MC could ignore it entirely, and nothing would happen.

At first glance, the system might seem a bit overpowered. But give it around 30 chapters, and you'll start to see the balance. The system is just there to help the MC now and then, offering a shortcut when it's convenient. It won't make him invincible overnight.

—

Pairing: I'm still undecided. Harem? Single love interest? To be honest, I'm open to either and will let the readers decide.

The release schedule is set for every Monday, Wednesday, Friday, and Saturday, with one chapter per release, but may increase depending on the support this fanfic receives.

—

I am incorporating some ideas and drawing inspiration from the first two or three chapters of the novel 霍格沃茨的路人教授 by Chinese author 江年.

If the original author feels offended, I will promptly modify or remove the related content.

I will give credit to the authors whenever their ideas appear.

—

I have a family with two kids—a daughter and a son. I work full-time and dedicate my free time to writing, usually after spending time with my family. This gives me about two or three hours to focus on writing, and I absolutely love it.

I'll do my best to stay consistent.

—

If this sounds like your kind of story, I'd love for you to give it a try! Your feedback would mean a lot, but please wait until you've read at least 15 chapters before sharing your thoughts.

And if this isn't your taste, no problem! There are plenty of other stories in this genre for you to explore.

Harry Potter and all other fictional elements in this fanfiction belong to their respective authors, including J.K. Rowling and others. I don't own any of it.

If you enjoy these stories, I encourage you to support and respect the official content above all else. It's important to honor the original creators!

Disclaimer: I used AI to help with grammar and polish the writing, but as the story goes on, I’m relying on it less. The story itself is 100% from my head, so please read it only if you can tolerate this. And please go easy on me if you spot any mistakes! Hope you enjoy it anyway!

—

If you wish to support me, please head to , where you can subscribe to chapters before they're published here. More than 10 chapters are available for $2, and all completed content is available for $5.

[email protected]/RyanFic

Thank you!

Still Defiant! SI-OC [Marvel/DC]

★ 4.9

EmmaCruzader

What does it mean to be a hero? Daniel Evans Tries to answer this question as he embarks on a self-imposed mission in a familiar, yet unfamiliar world. Being a hero has never been easy, but even if the world tries to crumble around him, he will stand firm, because no matter how difficult or dangerous it is, he will remain Defiant.
SI-OC, MC-hero, MC-viltrumite, MCU-AU, DC Comics AU. Marvel AU.

A Scoundrel’s Staycation (Harry Potter AU)(MoD!Harry)

★ 4.8

Cambrian

Summary: An AU featuring a Master of Death Harry Potter who left his original world behind upon finding out he was immortal. After a dozen or so different universes all with their own adventures, he starts to feel like he needs a bit of a break. Only, the peaceful and quiet nature of the world where Death has brought him might be hiding dark secrets just beneath the surface…

(Always Five Chapters ahead over on my Patreon)

-x-X-x-

Check me out on my other active websites!

Patreon (With Annual Pledging for One Month Off!): https://www.patreon.com/Cambrian
Hentai-Foundry: https://www.hentai-foundry.com/user/Cambrian/profile
QuestionableQuesting: https://forum.questionablequesting.com/members/cambrian.1638/
Archive of Our Own: https://archiveofourown.org/users/CambrianBeckett

Harry Potter: Gryffindor Warrior – HP/Hogwarts

★ 4.5

DylanBriak

After a strange fever, Harry Potter wakes up feeling different. His mind is filled with memories of a powerful sorcerer from another world, memories that shouldn’t be his.

Suddenly, magic isn’t just wands and spells. It’s something deeper, something ancient. But in a world where magic feels weaker than it should be, Harry struggles to make sense of his newfound knowledge.

Update rate: 3 Chap/ week. Monday, Thursday, Saturday.

----------------

If you want to read 20 advanced chapters or simply support me, it's just $6. Here's the Pat reon link:

https://www.patr eon.com/DylanBriak

(Remove the space!)