Crossover Fanfics
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Listing Series
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Maeglin by Alienkdk36_78
Fandoms: The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien, Harry Potter - J. K. Rowling
21 Mar 2026
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Summary
After the war, Harry isolates himself from the world, burdened by memories and quietly seeking peace through the stories that once brought him comfort. But when he falls asleep after rereading The Silmarillion, he awakens in a world not his own—one filled with white towers, elven cities, and names that once only lived on paper.
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" Maeglin "
Series
- Part 1 of Crossover Fanfics
- Part 2 of Simarillion Fics
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Ardamire by Alienkdk36_78
Fandoms: The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien, Harry Potter - J. K. Rowling, The Lord of the Rings - J. R. R. Tolkien
22 Mar 2026
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Summary
Harry was having a great vacation when suddenly a literal black hole appeared on his feet causing him to crash land to an Elf and Dwarf on a boat in the middle of the ocean. Now appearing in this new world set sailing to the so called Valinor, what kind of adventure awaits?
Feanor: “WHAT DO YOU MEAN I HAVE AN OLDER BROTHER?!”
Nerdanel: “Wait—older? As in... before you?”
Fingolfin: “Father never said anything…”
Finarfin: “Why does this sound like one of those mortal soap operas?”
And then, one day, Feanor caught sight of him.
Harry: walking peacefully with a basket of fruit and flowers gifted by the Elleth, smiling as he hummed a tune.
Feanor: pauses dramatically
Feanor: My elder brother...!
Feanor: squints
Feanor: My younger brother…!
Feanor: nods, looking entirely satisfied as if this somehow made sense
Harry: ????
Harry: Who is this?
Series
- Part 2 of Crossover Fanfics
- Part 3 of Simarillion Fics
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Furs and Meows by Alienkdk36_78
Fandoms: The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien, Harry Potter - J. K. Rowling
11 Jul 2025
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Summary
Sirius Black is pissed as he watched his Godson life after he died. Now with a second chance as he time travel to the past he decided fuck the future he will turn the Wizarding Britain upside down with the help of mysterious colored cats that suddenly appeared out of nowhere as they then bring chaos to the world.
Harry: What a peaceful day
Sirius: “Good. Very good. Now let's blow up the Death Eater's Headquarters!!!.”
Feanorians: Meow! Meow!!
Nolofinweans: Meow~ Meow~!!
Arafinweans: Meow... Meow!!!
Hedwig: Toot! Tooot!!
Harry:…Like I said. What a peaceful day :)
Remus: Is it too late to go back down?
Series
- Part 3 of Crossover Fanfics
- Part 4 of Simarillion Fics
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Escaping and Chaos by Alienkdk36_78
Fandoms: The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien, Harry Potter - J. K. Rowling
12 Jul 2025
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Summary
While being chased by Fenrir Greyback and his pack in the Forbidden Forest, The Trio had accidentally had fallen to a hole due to the sudden Earthquake landing them on another world as an Elfling. Now living in a new world Harry, Ron, Hermione needs to adjust in a new strange where Elves, Dwarfs and another Dark Lord exist while being oblivious of sheer resemblance of their looks to some Elves.
Finrod:
“This feels so wrong.”
“They bicker like Father, Uncle Fëanor, and Uncle Fingolfin… but with the wrong faces.”
“I’m just going to pretend I didn’t see that.”
“H.E.L.P. A.S.A.P.! W.E N.E.E.D B.A.C.K U.P”
Series
- Part 4 of Crossover Fanfics
- Part 5 of Simarillion Fics
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Melkor’s Only Maia by Alienkdk36_78
Fandoms: The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien, Harry Potter - J. K. Rowling
13 Jul 2025
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Summary
Accepting a random person favor after his death is should be a No go. Now living in Silmirallion world as Melkor’s Only Maia but one thing is for sure Harry’s is done playing nice.
Dark Throne Room. Ominous lighting. Evil plotting in progress. Melkor, seated on his dark throne, voice dramatic and thundering:
Melkor: "As I was saying, let us DESTRO—"
Minion: "LORD MELKOR!!"
Melkor: "WHAT?! CAN’T YOU SEE WE’RE HAVING A MEETING?! THIS IS THE SIXTH TIME! IT BETTER BE IMPORTANT OR I WILL THROW YOU INTO THE VOID!!"
Minion: "But my Lord! Your Maia—totally-not-your-child—has run away from home… again!"
Melkor: “...Oh.”
Minion: “...”
Melkor: “...”
Melkor: “WHATTTTTTTTT?!”
Mairon in the background, facepalming:
Mairon: “I swear, It was peaceful when I was in Aule's forge.....why did I decided to follow Melkor again?…”
Series
- Part 5 of Crossover Fanfics
- Part 6 of Simarillion Fics
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Husky's Adventure by Alienkdk36_78
Fandoms: The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien, Harry Potter - J. K. Rowling
14 Jul 2025
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Summary
Becoming A Husky as is not in Harry’s plan but also getting entangle a family of trio much less drag in messes.
Fate: XXXX is going to die today.
Husky!Harry: Not on my watch!!!
Husky!Harry: Proceeds to save the said Elf while traumatizing enemy and said Elf alike.
Maeglin: What a normal day.
The said Elf and Enemy: DOES THIS LOOK NORMAL TO YOU?!?!
Series
- Part 6 of Crossover Fanfics
- Part 7 of Simarillion Fics
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A Silly Love Story by Alienkdk36_78
Fandoms: Harry Potter - J. K. Rowling, The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien
20 Sep 2025
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Summary
Bring Reincarnated as Gildor was not on bucket list much less be entangled in a silly romance with Celegorm Feanorian.
Series
- Part 7 of Crossover Fanfics
- Part 1 of Love Story Series
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An Unexpected Love Story by Alienkdk36_78
Fandoms: Harry Potter - J. K. Rowling, The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien
25 Sep 2025
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Summary
Harry didn’t expect to be reborn in Silmarillion as a npc but he was glad as he finally got to experience was its like to have a family though an accidental meeting he got to befriended a mute Ellon named Kano.
Series
- Part 8 of Crossover Fanfics
- Part 2 of Love Story Series
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Story Ideas by Alienkdk36_78
Fandoms: The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien, Harry Potter - J. K. Rowling
27 Mar 2026
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Summary
All of my story ideas including HP X Silmarillion or just pure Silmarillion stories.
A/N: Some of them are already published.
Series
- Part 9 of Crossover Fanfics
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Penpal by Alienkdk36_78
Fandoms: Harry Potter - J. K. Rowling, The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien
27 Sep 2025
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Summary
Feanor had a secret that even his wife and sons didn't know about. A secret that he had kept when he was still a child. A secret that he had a friend and not just any friend but rather a friend from another universe and his was...
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.
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" Harry Potter "Fëanáro: HARRY??!!
Fëanáro: HELLO?! WHAT DO YOU MEAN GOODBYE?!
Fëanáro: YOU’RE NOT ALLOWED TO DIE. THAT’S AN ORDER.
Fëanáro: HARRY POTTER, DON’T YOU DARE GO SILENT ON ME AGAIN!!!
Fëanáro: ANSWER ME—YOU—YOU LITTLE STUBBORN MORTAL TWIT—
Fëanaro: ........
Fëanaro: No...No..No
Fëanaro: Inhale...Exhale...
Feanaro: Think..Feanaro ..think......
Feanaro: ......
Fëanaro: Nerdanel won’t mind another son. Right?
Feanaro: ......
Fëanaro: The boys will be fine. They like chaos. He’ll fit right in.
Feanaro: .....
Fëanaro: Now where is Nolo and Ara...?
Series
- Part 10 of Crossover Fanfics
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An Otherworldly Love Story by Alienkdk36_78
Fandoms: Harry Potter - J. K. Rowling, The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien
01 Oct 2025
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Summary
Finrod didn't expect that following a glowing deer would lead him to another world much less different than his own and neither did he expect to meet someone who was capable of making his skip a beat.
He was doomed
Series
- Part 11 of Crossover Fanfics
- Part 3 of Love Story Series
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Mistaken Identity by Alienkdk36_78
Fandoms: Harry Potter - J. K. Rowling, The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien
23 Mar 2026
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Summary
Ron never expected that after falling asleep while visiting his brother's grave that waking up he was suddenly transported into another world and got mistaken as " Mairon " and now here he was finding this real " Mairon " and finding a way back home while a creepy dude called " Melkor " and a beat ass stalker who keeps insisting him that he is " Mairon " called Aule making him sigh.
Ron: Becoming Mairon.
Ron: Sounds Familiar....Hmm
Ron: Meeting Aule.
Ron: Familiar.
Ron: Meeting the Finweans..
Ron: Familiar..Familiar.
Ron: Meeting Melkor.
Ron: Holy Shit! Creepy ass dude!
Ron: but Sounds Familiars.... now where have I heard them again?..Nahhhh
Harry and Hermione: RONALD WEASLY!!!!
Series
- Part 12 of Crossover Fanfics
- Part 10 of Simarillion Fics
- Part 4 of Love Story Series
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The Traitor and The Coward by Alienkdk36_78
Fandoms: Harry Potter - J. K. Rowling, The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien
28 Dec 2025
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Summary
Harry and Draco didn’t expect that after completing a task and retrieving a forbidden book, they would suddenly be transported into the book itself. The Silmarillion, founding themselves inhabiting roles they had never signed up for and now trapped in this unfamiliar world, they were left trying to find answers—why had they been brought here, how could they return, and what was the meaning of the mysterious numbers that had appeared on their wrists? All while navigating their new identities, they had to figure out how to survive without fully embodying the roles that history—or fate..assigned them.
This was not a mission they had volunteered for.
Salgant: “Blo—”
Maeglin: “Ahahaha, look what a beautiful day!”
Salgant: “Bit—”
Maeglin: “Bright! Gorgeous!”
Salgant: [was about to curse again when Maeglin knocked him out cold]
Maeglin: “Nothing to see here.”
Maeglin: “Just friends bonding…”
Maeglin: “So… shoo, shoo!”
Maeglin: “WE ARE NOT HERE!!”
Maeglin: POOF
Turgon: “???”
Idril: hmmmmm… strange…
The Rest of the Lords: “What the fuck???”
Series
- Part 13 of Crossover Fanfics
- Part 11 of Simarillion Fics
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In Another Life by Alienkdk36_78
Fandoms: Harry Potter - J. K. Rowling, The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien
03 Jan 2026
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Summary
Harry didn’t expect that after finally meeting death he will be transported and reborn into the Silmarillion. A book that Luna gave him to read but he is now. He, Harry Potter had become Turin Turambar, One of the most miserable character in Silmarillion but here he was pissed and decided to give the plot the middle finger. Deciding to overturn the plot but before that he will..cough...fangirl Beleg first.
Túrin!Harry: “Listen here, you blasted Orc—”
Follower 1: “My lord is doing it again.”
Follower 2: “Amen.”
Followers: sigh
Mablung: “Get down this instant, you brat!!!”
Beleg: “Not again…”
Thingol: “???”
Series
- Part 14 of Crossover Fanfics
- Part 12 of Simarillion Fics
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63 Days by Alienkdk36_78
Fandoms: The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien, Harry Potter - J. K. Rowling
28 Mar 2026
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Summary
Meaglin live his life in Gondolin the same is every but he knew deep down something was missing and he didn't what is and or rather who?
Series
- Part 15 of Crossover Fanfics
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An Unspoken Love Story by Alienkdk36_78
Fandoms: The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien, Harry Potter - J. K. Rowling
28 Mar 2026
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Summary
Celebrimbor was happy now that the family was now reconciled and even Haru Finwe was back however he didn't expect was that his Atto, had now return. His other Atto, his other biological parent, Elerion is back.
Series
- Part 16 of Crossover Fanfics
- Part 5 of Love Story Series