Best of Both Worlds
21 stories
Faultlines by NyGiLu
NyGiLu
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    Parts 33
One tiny decision leads to huge consequences, as Harry Potter is raised as Tony Stark's younger brother. Story is told in non-chronological order (but follows a clear narrative. I hope) and will cover events up to the end of Civil War.
Of Lightning Bolts And Green Eyes by idelisa-ma
idelisa-ma
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    Parts 13
After getting kicked out of his relatives' house after his fourth year of school, Harry Potter decides to get a room at the Leaky Cauldron, where he meets a strange man. Following the advice of strangers has never been a good thing but Harry decides to do so, receiving a shocking revelation. Who knew that a simple test would change his life forever? I'm happy to say that this fanfiction is now crossposted on Ao3 under the name LittleBlackDeath03
Another World (Avengers and Harry Potter crossover) by Crystalismymame968
Crystalismymame968
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    Parts 23
Harry Potter is broken and neglected. Forgotten and betrayed by all his friends except one. He runs away from home to new york. There he meets the avengers. Will they be allies or will there be another war? Happens after After of Ultron but spidey's here. After deathly Hallows. Luna skipped her last year and went to become a magizoologist. Contains Cursing but nothing else
Heroes Assemble! by stargon1
stargon1
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    Parts 129
After five years travelling the world, Harry Potter has landed in New York. He figures that there's no better place than the city that never sleeps to settle in and forge a new life. If only the heroes, villains, aliens and spies had received the message. Begins just before the Avengers movie and continues through the MCU. Expect a long story with some extra faces along the way.
The Elfin Wizard by TheHufflepuffian
TheHufflepuffian
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    Parts 7
(Currently on Hold) Harry leaves for New York shortly after the battle of Hogwarts after finding out that his parents bound his creature inheritance at birth, and at his death the block came undone, leaving him with a new inheritance with new abilities and details he doesn't understand. When he sleeps with someone, he finds out that not only does he have a mate, but there are important details about his inheritance he didn't know.
God Raised by SlytherinGirl783
SlytherinGirl783
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    Parts 19
Harry Potter is discovered on the doorstep of the Dursleys by none other than Loki. Loki, sensing his power, takes him to raise as his own. What happens next? Read to find out! Highest Rankings: #1 in #gods #12 in #hogwarts
Mr. Harry Potter-Stark by Aotknbmlmcy7wf
Aotknbmlmcy7wf
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    Parts 9
Harry got married and now life is great except for a few minor hiccups, wanna come along?
Destiny(Hiatus)   by Enigma108
Enigma108
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    Parts 96
After being bitten by a radioactive spider, the last thing Peter Parker expected was to suddenly have magical abilities. Now not only does he have to deal with his senses being dialed up, Peter has to try and control his own magic. Unfortunately, due to true Parker luck, that didn't happen. So, after getting expelled from Ilvermorny, Tony decided to send Peter back in time to gain Harry Potter's trust so the wizarding world could help with any future threats. Peter found himself thrown back into another war, trying his best to save as many people as he can. But he didn't expect to encounter the many secrets that could change his very own future forever. I do not own Harry Potter, the Avengers or anything else that might turn up. ⚠️I don't edit my stories because I like to see the growth as a writer. So, with that said bare with me because the beginning of the story is not as well written as the later chapters ⚠️ Ranked # 1 for Percy Weasley Ranked # 1 for House of Black Ranked # 1 for McGonagall Ranked # 2 for Fred Weasley Ranked # 1 for Dean Thomas Ranked # 2 for Sirius Black Ranked # 12 for Spiderman Ranked # 1 for Bill Weasley Ranked # 1 for Charlie Weasley Ranked # 4 for Hogwarts Ranked # 8 for spells
It Only Takes a Second by okayletsbesirius
okayletsbesirius
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    Parts 78
Harry Potter has been living his life in fear. Fear of his uncle, fear of his power, fear of his magic, fear of his own shadow. But one day, during a routine trip to the market, he meets Tony. Tony has everything someone could possibly desire. But there's one thing missing from his life. When he is walking down the street one day and sees a boy faint on the sidewalk in front of the market, he takes him in under his wing. Is it possible that this one second could possibly change both of their lives forever? (***this fiction will differ from the actual story line and some characters will be very ooc-- please also note trigger warnings on past abuse, sexual assault, and self harm***)
Once Upon a Quidditch Match by spideyyyyyyyyyyyy
spideyyyyyyyyyyyy
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    Parts 37
Harry Potter is sick, but cannot risk skipping a Quidditch game that turned out to be almost fatal.... Until someone saves him..