Fanfic / Harry Potter and the Boiling Isles

Harry Potter, the Boy Who Lived, finds himself spending his summer alone. Ron is at home with his own family, Hermione has moved to France, and neither of them have sent Harry any letters. However, Harry ends up meeting a strange girl who not only understands his feelings of isolation, but ends up taking him to another world beyond his wildest dreams.

Harry Potter and the Boiling Isles is a The Owl House and Harry Potter crossover by TimAllPowerful_xX and can be found here on Archive of Our Own.

Harry Potter and the Boiling Isles contains the following examples:

• Accidental Truth: When going to get Ron so he can stay with them at the Owl House, Harry and the other residents pass Eda off as Harry's aunt. Eda finds out a few chapters later that she really is Harry's aunt.
• Adaptation Origin Connection: The Choosey Hat is revealed to have been bought to Hexside by former Principal Faust. Canonically, the Hat and Faust appear in separate episodes a season apart, with no mention of either in relation to one another.
• Adaptational Early Appearance:
  • Raine Whispers makes their first appearance during Chapter 11, set during the events of "Covention", well before their first canonical appearance, which was a brief non-speaking role in "Hunting Palismen".
  • Darius and Eberwolf show up in the equivalent of "Hooty's Moving Hassle", where in canon their first proper debut was over a season later in "Eda's Requiem".
  • Harry meets Viney during the equivalent of "Something Ventured, Someone Framed", which is several episodes before her canonical introduction in "The First Day".
  • Dell crosses paths with the kids in the equivalent of "Escape of the Palisman", a full season before his first flashback appearance in "Knock, Knock, Knockin' on Hooty's Door" and first present-day appearance in "Elsewhere and Elsewhen". The same chapter also features an appearance by Flapjack, likewise appearing nearly a full season before his first appearance in "Hunting Palismen".
  • There are three examples of this in the equivalent of "Sense and Insensitivity". Emperor Belos and Hunter both appear half a season before their respective debut and silent cameos in the Season 1 finale episodes, and Hunter's proper debut in "Separate Tides". Vitimir also appears, while his first appearance in the form of a non-speaking role happened a season later in "Hunting Palismen".
• Adaptational Sexuality: In canon, Bill Weasley's only romantic interest was Fleur Delacour, but in "The Care Package" it is mentioned in Mrs Weasley's letter to Ron that Bill had just broken up with his boyfriend named Asim.
• Ambiguously Bi: When meeting the Blight twins for the first time, Ron appears flustered by both Edric and Emira, internally describing both of them as "handsome" and thinking that even their laughter is "attractive".
• And I'm the Queen of Sheba: In "Flying Cars & Breaking Bars", King tries to intimidate Ron.
  King: Fool! When I retake my throne, the King of Demons shall have you boiled in oil for your insolence!
  Ron: A ‘king of demons’? Right, and I’m the Minister for Magic.
• And I Must Scream: This seems to be how all Boiling Isles ghosts left unsealed by Oracles eventually end up. It's described as a hellish existence, being bound to one place forever, unable to experience any of the things you felt in life, and as a result slowly losing your memories, yourself, and your capability to understand and care for the living.
  • The Witch-King's Knights were all mummified alive, embalmed and preserved so that they could never decompose and rejoin the Titan. Now they're stuck haunting Kneetop, and if anyone riles them up they'll swarm out of the city and inflict the same fate on others.
• Animal Testing: Exaggerated with Vitimir, who gleefully performs painful experiments on magical creatures (and is implied to do the same to witches as well...).
• Anti-Magic: Misty Valley is surrounded by a spell that cancels out all flight magic, making it that much harder to enter.
• Arbitrary Skepticism: This occurs multiple times, on both sides of things:
  • Many of the Boiling Isles witches are skeptical at the idea of humans that are capable of using magic.
  • Despite being a wizard who is currently driving a flying car, Ron initially refuses to believe Luz about the Demon Realm before Eda gives a demonstration of her magic. When Luz lampshades the fact that he's in a flying car in response to his skepticism, and he doesn't get the connection between that and what they're claiming, Luz mentally notes that their magic gives human wizards a rather odd view of what is and isn't believable.
  • On the flip side a few minutes later, when Luz suggests that a "magical letter-goblin" is stealing Ron's letters to Harry, Eda and King are both rather skeptical about the idea despite (as the narration reminds us) being a cursed witch and tiny demon, respectively, who are both from a dimension of magic and horrors. Hilariously, in a way, she's exactly right, given that Dobby is later confirmed to have been stealing his letters like in canon.
  • In Harry's first meeting with Luz, he is quick to defy her skepticism about being a Wizard simply by bringing his chocolate frog to life, burying all of Luz's doubts.
  • When Darius, Ron, Harry, and Eberwolf encounter a Dementor in the maze, Eberwolf suggests that the being sounds like a legend of a "Wraith", beings that attacked the Isles centuries ago until "beasts of light" banished them, but Darius is skeptical until Ron notes that the aforementioned beasts sound like the entities guarding the door to the maze.
• Arson, Murder, and Jaywalking: The spot remover Enchant-away is guaranteed to remove stains left from rituals, exorcism, murder, and even ketchup.
• Ash Face: Luz gets one from playing Exploding Snap with Harry and the Weasleys.
• Aura Vision: There is an equivalent of this called "the Sight", which is a combination of Bard and Oracle magic, which allows Lilith to perceive Harry in this way:
  Harry was luminous and beautiful, a beacon. His was a song of the glorious sunrise piercing triumphantly through dark storm clouds.
  • This is also what allows Lilith to see the scar for what it really is
  The scar was perfect, absolute nothingness - darkness beyond darkness, power beyond power.
  Its was not a song, but a shivering, unending scream.
• Berserk Button:
  • Darius is able to shrug off most of Eda's playful insults, but is infuriated when she says he dresses funny.
  • Bump is visibly furious when discussing everything he's heard about Dobby's former masters and their treatment of him.
• Big Sister Instinct: Luz admits to having this for Harry, whom she treats like a younger brother.
• Bile Fascination: Luz uses the term In-Universe when discussing with Amity how she'd be over the moon seeing real ghosts if their lives weren't in danger.
• Blackmail: Darius threatens to expose Harry's relation to Lilith if the latter doesn't keep her nose out of his business in Chapter 17.
• "Blackmail" Is Such an Ugly Word: Eda insists she isn't abducting Harry: just taking him on a surprise playdate.
• Bilingual Bonus:
  • Ron's Swedish uncle always said "Hellre en rövare i poolen än en polare i röven", and while Ron doesn't know what it means In-Universe it translates to "Better a robber in the pool than a pal in the ass".
  • When Luz asks if anyone can tell her how you say "a crushing, agonizing failure" in Spanish, Hooty answers, "Faktisk can jeg ikke spansk!", which is Danish for "I actually don't know Spanish".
• Bond Villain Stupidity: With Eda forced into sleep by pixie dust, and Harry and the other kids tied up and helpless, Gregore has the perfect opportunity to end them all right then and there. He refuses to, however, insisting that he needs to look good before having a proper confrontation with the Owl Lady. Predictably, this ends up costing him.
• Bread, Eggs, Breaded Eggs: When first meeting King, Ron understandably doesn't know what he is. He asks aloud if King is a dog, a zombie, or a dog zombie.
• Broke the Rating Scale: According to Eda, Ashbellys, giant fiery snake demons, have a melting capacity of 7, which Ron doesn't think is too bad... until Eda tells him that the scale goes from 1-5.
• But I Read a Book About It: Harry attempts a Wronski Feint despite having only, in his words, "read about it in a book once". Of course, being Harry, he pulls it off.
• Cannot Spit It Out:
  • After learning the truth about Harry's parentage, Eda struggles throughout all of Chapter 13 to find away to tell Harry the truth, but always finds herself unable to do it, eventually deciding not to tell him at all. All the while, Eda tries to justify it to herself by thinking that it's not her problem to sort out, and that letting Harry be happy in ignorance rather than to shatter his world with the truth is the right thing to do. A questionable decision, to say the least.
  • In "Moonlit Midnight Madness", both Ron and Eda are wishing that Ron could stay longer, but as Ron is assuming that Eda is still sticking by her original statement of him just staying for a week, and Eda is assuming that he would have spoken up by now if he wanted to stay longer, they spend most of the chapter avoiding each other instead of talking things out.
• The Cuckoolander Was Right: In Chapter 13, Luz, Ron, and King are all exposed to a particularly nasty and forbidden Bard spell called the Grey Dirge at Faust's funeral, the sadistic principal planning on having his revenge on the former troublemakers from Hexside even from beyond the grave by draining their minds from the band's music. After Eda, Harry, and Raine stop it, the three are still out of it for a while, with Luz apparently "seeing through time" and mentioning a "Snakey Riddle", who's gorgeous but mean, King exclaiming that there's people in the stars watching him, and Ron saying that Scabbers is a Wizard who works for You-Know-Who. It all sounds insane, but those familiar with the canon of either side of the crossover will know that it's more accurate than is immediately obvious.
• Color-Coded Wizardry: Harry's attempts at spell circles are green, matching his eyes.
• Commonality Connection:
  • Luz and Harry bond over both being friendless loners until they stumbled upon a magical world.
  • Ron and Amity find common ground in being the younger sibling at the mercy of their respective older, mischievous twin siblings.
  • Ron and Gus bond over being overlooked due to their young ages.
• Condescending Compassion: Luz sometimes feels this way about how Harry and Ron try to reassure her about things they can do as Wizards that she can never do as a Muggle.
• Conditioned to Accept Horror: Harry genuinely doesn't understand why people caring about him react so badly to the tidbits he casually reveals regarding his childhood in Privet Drive.
• Contrived Coincidence: Luz, Eda and King just happen to decide to go to Privet Drive and rescue Harry the same night that Ron drives there to do the same, leading to them meeting each other.
• Crippling Overspecialization: Lampshaded by Ron when he hears about Coven Sigils, comparing it to someone wanting to be a master bodybuilder but then breaking every limb but their right arm.
• Crossover Relatives: In this story, Lilith is Harry's biological mother. This also makes him, unknowingly, Belos/Philip's many times great-nephew.
• Curse Cut Short: Eda initially refuses to look after the three babies dropped on her doorstep, managing to call them "drooling, diaper-filling little shi-” before King reveals that it is the Bat Queen who is asking her to look after them, leading to Eda immediately cutting herself off and saying that she'll happily do as asked (with the promise of a vast reward, of course).
• Cutting Off the Branches: Several things happen which have knock-on effects, including Hermione quitting Hogwarts and Harry effectively moving in with Eda.
• Daddy Had a Good Reason for Abandoning You: Harry's conception was an accident that happened when Lilith was demonstrating a Mystical Pregnancy spell to James, who had been rendered sterile by normal means thanks to a Death Eater curse. When she gave birth to Harry and saw that his ears were round, she decided that it would be safest for him if she gave him to James. Despite having convinced herself it was for the best, she was crying when she left him, and she's clearly floored and regretful when she learns that James and Lily were killed.
• Deadpan Snarker: When Dobby claims that Harry can't go to Hogwarts because he's too good to lose, Ron sarcastically replies that in comparsion he can just go ahead and die.
• Death by Adaptation:
  • At least a possible one. In the original episode "The Intruder", Eda spits the Snaggleback out in an owl pellet after she has been transformed back from the Owl Beast, and he goes on to appear in more episodes. Here, in the chapter with the same name, Eda never does, meaning that the Snaggleback could very well have been killed by the Owl Beast.
  • Faust was never seen outside of a flashback in Season 2 in canon, but there was also never any confirmation that he was dead. Here, he explicitly died shortly before Luz arrived in the Boiling Isles, with Eda and company attending his funeral in Chapter 13.
• Department of Redundancy Department: When listing all the things Harry expected to find within the old Wittebane Hovel, the list includes "mould? Burrowing animals? Mould? A poor tramp or two seeking shelter? Mould? Probably mould".
• Desperately Craves Affection: Hooty gets so little respect that Harry calling him "sir" causes Hooty to cry Tears of Joy.
• Didn't Think This Through: After bribing a snorse with sugar cubes so that it will carry their group down into Misty Valley, after it's left them there, Ron questions how they're supposed to get back up without it, causing them to realize they didn't consider that.
• Dies Differently in Adaptation: Benjy Fenwick, who in canon is only known as a member of the Order of the Phoenix who Mad-Eye remarks they only ever "found bits of", here dies slowly after taking a curse from Dolohov that causes his face to melt. Hard to say which is worse.
• Distracted by My Own Sexy: In Chapter 17, Eda checks her body out after the Body Swap spell. Since she's in Harry's body at the time, it gets commented on by some passing demons.
• Dramatic Irony:
  • Lilith is baffled by how Harry's ears take after his Wizard father's, as Witch genes are strong, so the only way that that should be possible is if there were some human bits already swimming around in the Clawthorne genepool. Readers know that the Clawthornes are descended from the human Caleb and his witch bride Evelyn.
  • Similarly, what Luz, King, and Ron are saying after being rescued from the Grey Dirge is taken as nonsense, but to the readers, who are familiar with the canon plots of both series, they're more accurate than the others assume them to be.
  • After reading The Tale of the Three Brothers, Luz is amazed, thinking that Harry's invisibility cloak is the same one from the story. Harry rolls his eyes at the very idea, but of course those familiar with the franchise knows that the cloak he got from his father is indeed the Cloak of Invisibility that belonged to Ignotus Peverell, the third brother from the story.
• Dumbass Has a Point: Waldreg is a rather incompetent fit for janitor at Hexside, but he's perfectly correct in pointing out that keeping unlabeled rat poison right to the sugar is stupid.
• Entertainingly Wrong: After Harry sees Luz interacting with Owlbert, he rightly guesses she has some connection to magic but assumes she's a Witch like him.
• Everybody Knew Already: When Harry reveals his musical interests to the rest of the group, they reveal they all knew about it already because he did such a bad job of hiding it from them, like simply hiding his instrument behind his back.
• Everyone Has Standards: Eda may be a criminal outlaw who doesn't care about the rules, but she vehemently refuses to give alcohol to an eleven-year old.
• Evil Overlord: The Boiling Isles appear to have had one of these in the form of the Witch King, who apparently led Wild Witches in a bloody war for ten years before Belos took the throne.
• Exact Words: The House Elf Oath to serve their family says that they must do do as long as they "walk this Earth", but as Ron points out to Dobby, the Boiling Isles don't exactly count as "this Earth". He then proves that he's free of the binding by rearranging King's "minions", since he wouldn't be capable of following the orders of someone not in the family he's bound to if he was still under the oath, allowing them to free him before Harry attends Hogwarts, whereupon he takes up the janitoral position at Hexside.
• Fan Art: One of the reviewers who goes by @rinaestel on Tumblr have drawn multiple pieces of fanart for this story which can be found here and here.
• Fantasy-Forbidding Father: The Dursleys confiscate all of Harry's magical items once he returns from Hogwarts.
• Fantastic Measurement System: When Eda reveals the entrance to the treasure they're hunting (which is in fact a rare magical bug), Harry describes it as half as tall as Griffindor Tower and six Hagrids wide.
• Flaying Alive: Vitimir flays a chimaera alive while in the process of vivisecting it.
• Foreshadowing: There are a ton of clues to Lilith being Harry's mom sprinkled throughout the chapters preceding "Covention Confrontations". When Harry first meets Eda in Chapter 1, he sees "a gleam of recognition flash by" in her eyes. In Chapter 5, when talking about how families are complicated, Eda remarks that the least messed up thing about her family is that she has a nephew she's never even met (not then knowing that Harry is said nephew). There are also a few internal comparisons from Eda's perspective about how Harry's green eyes behind round glasses remind her of Lilith.
  • In Chapter 12 one of the reasons that Lilith decides to give Harry up is because she's worried about Vitimir going after him for rare ingredients. Sure enough, when Harry meets Vitimir he tries just that.
• "Freaky Friday" Flip: The "Body Swap" occurs in Chapter 17, with Eda ending up in Harry instead of King, King ending up in Ron, Harry ending up in Luz, Ron ending up in King, and Luz in Eda like canon.
• Friendless Background: Harry, Luz, Ron and even King all share this. Harry and Luz have both always felt like outsiders, never having made any friends until they came into contact with a magical world. Narration from his point of view gives the reader insight to how Ron often feels lonely and forgotten even at the Burrow, and it goes without saying that his family is not of high standing in the wizarding world. Then, of course, there's King, who rarely ever gets taken seriously and (before meeting Ron) considers Harry and Luz his only two friends after having known them both for only a few days.
• Fusion Fic: The world of Harry Potter is combined with that of The Owl House, though there are notable changes to the canons of both series, like how the timeline of Harry’s world has been moved thirty years forward.
• Ghost City: Kneetop, an ancient city on the Knee, infested with the ghosts of the Witch-King's Knights.
• Gold and White Are Divine: The clergy of Titan-worship on the Boiling Isles, from preachers to the five High Priests take after Emperor Belos, who is seen as the greatest of the Titan's prophets, and dress in robes of white and gold.
• Grammar Nazi: Hooty proves to be on when acting as editor for Ron, Luz, and King's book.
• Grave Robbing: Chapter 13 reveals that after Evelyn died, Belos stole Caleb's body from his grave and erased the names from his and Evelyn's tombstones.
• Heal It with Booze: Sort of. Apparently, apple blood can help burn things like the effects of allergies out of your system. Of course, Raine uses their whistle-trick to distill it first before giving it to Harry to help him with his Devil's Paw allergy.
• Height Angst: Harry is very happy to end up in Luz's body during the "Freaky Friday" Flip in Chapter 17, and quickly tells her not to take it away from him when she tries to say that she's not that tall.
• High Priest: The religion on the Boiling Isles have five High Priests, though even they answer to Emperor Belos.
• Horrifying the Horror: Word Of God has it that even Voldemort wouldn't ally with the giraffes.
• Human Resources: Vitimir tries to vivisect Harry to use him as potions components.
• Human Sacrifice: Well, "witch sacrifice" in any case. In "Moonlit Midnight Madness", Eberwolf waits for Darius in a lonesome place called the Red Glade, the "Red"-part apparently being because of all the blood that was spilt there in worship of the Titan long ago.
• Innocently Insensitive: Luz accidentally offends the worm monsters in the Detention Pit by calling them snakes.
• I Never Told You My Name:
  • A variant, when Luz calls the Dursleys looking for Harry, she introduces herself just as Harry's friend, but the fact that Vernon used Harry's last name of "Potter" when Luz never mentioned it clearly shows that he knows who Harry is despite his denials.
  • Later, Eda realizes that Harry is Lilith's son when she knows his name despite Eda never saying it. Lilith tries to justify it by claiming to have heard Luz say it, but Eda sees through the lie instantly.
• In the Back: After having his butt handed to him, Vitimir attempts to literally stab Lilith in the back while she's tending to Harry. Luckily, Harry fires Petrificus Totalus at him just in time.
• Kill It with Fire: Fire is one of the main ways to deter a Boiling Isles ghost.
• The Kindnapper: Eda desires to take Harry to the Boiling Isles, but Luz tells her that what she's doing is technically child abduction. When Luz finds out how abusive the Dursleys actually are, she drops her complaints.
• Knew It All Along: It is revealed that Belos knew about Lilith's pregnancy all this time (although not that the child was seemingly human).
• Like Father, Unlike Son: Or rather "mother", in this case. Whereas Lilith is tall, regal, well-kept, straight-faced, strict, and morally questionable to say the least, Harry is small, modest, wild, emotional, with a certain disregard for the rules, flexible, and rather morally upstanding for the most part. Eda even remarks that, other than his eyes, Harry doesn't even look a thing like his mother. He also has more of a preference for Bard and Beast-Keeping magic than Lilith's own affinity for Potions due to Snape ruining the subject for him.
• Look, a Distraction!: To distract the Dwarves so the group can escape the Deep Veins, Harry shouts "Look, fifty percent off beard oil!" With their obsession with beards, all the Dwarves turn to look, providing an opening.
• Magic Misfire:
  • When Harry first draws a spell circle when he's listening to Eda talk about Boiling Isles spellcasting, the fact that he wasn't intending to do so may be part of it, but the circle is notably malformed and fizzles out without doing anything. Eda even notes that while it's not uncommon to mess up a spell on the first try she's never seen one that's unstable like that, as if the magic didn't want to be in a spell circle. When Eda discusses it with Lilith when she's in Harry's body, the suggestion comes up that his body is forcing his wizard magic into the channels meant for the magic from his bile sack, instead of drawing from said bile sack like it should be doing.
  • When showing off for Willow and Gus, Harry makes a "spineapple" tap-dance, unaware that doing so causes them to multiply... and attack anyone nearby.
  • Through the powers of the Wailing Star, Harry brings out the Resurrection Stone from The Tale Of The Three Brothers, trying to use it to see his parents... However, he wishes for it to "bring everyone back", and since it can't summon the spirits of real people, the Stone instead summons the spirits of dead characters from all the books of Bonesborough Library. Luz tries to fix it by summoning Death, but once they're gone he goes after them.
• Mama Bear: Lilith, for all her failings, is clearly protective of her son. When Darius makes some very thinly veiled comments about Harry's safety, thinking he's threatening her child, it enrages Lilith so much that she casually throws aside a wooden table against a wall with such force that it turns to splinters, immediately thereafter promising Darius that if he as much as looks in Harry's direction she will make sure reduce him to a stain. And when Vitimir later takes an interest in Harry for his experiments, Lilith doesn't hesitate to fight him off, and would have killed him if Harry himself hadn't talked her down.
• Messy Hair: Harry's hair is frequently described as wild and untamable. Eda says that all Clawthornes have thick and messy hair, remarking in her thoughts that Harry has definitely inherited it, and that his is even messier than her's was at his age. Given that he's also a Potter, Harry's hair is definitely untamable by any comb.
• Mirthless Laughter: Harry let's out a rather sad and self-deprecating one during his emotional talk with Luz about how much never knowing his parents hurts him in "The Care Package", when he immediately afterwards remarks that he's being silly because "you can't miss people you never knew".
• Mobile Maze: The ruins that the group explores in Chapter 19 turn out to be one of these, constantly shifting its corridors around.
• My God, What Have I Done?: "The Forest Of The Forgotten" not only has Luz's guilt over cracking Owlbert, but the Bat Queen's reaction when she realizes that her aggressive efforts to "protect" him from the humans are terrifying him.
• My God, You Are Serious!: When finally telling the Owl Housians about how Voldemort was stopped because of Harry, Eda laughs and mockingly suggests that Harry stopped a full on dark lord as a baby... only to stop as she sees Harry and Ron's expressions and realizes that they're completely serious.
• My Hovercraft Is Full of Eels: It takes awhile for Harry to get a handle on Beast-tongue (somehow giving a particularly impressive Cluster F-Bomb while trying to ask about the weather, and saying something that makes Puddles the griffin so angry Harry can only assume he insulted her mother), while Ron's efforts at Spanish are likewise gibberish.
  Ron: Luz? Tu mono duerme dentro de mí.
  Luz: (sighs) No, Ron, my monkey doesn't sleep inside you.
• My Parents Are Dead:
  • When hearing about how miserable Harry is at the Dursleys, Luz asks why he's even there in the first place, wondering if his parents sent them there for the summer. Harry, who has explained this many times before, simply answers that his parents are dead, much to Luz's horror.
  • Ron, realising that he's heard Luz talk about her mom but never her dad, asks what he is up to. Luz begrudgingly answers that her father Manny died of cancer.
• Mystical Pregnancy: As it turns out, in this timeline James was hit with a dark spell by Death Eater Dolohov, rendering him sterile. After Eda threw her into the human world for the night, and she intervened in a fight between James and some Death Eaters, including Dolohov, they got to talking and she told him of a spell that allows people who can't normally conceive to have children. While demonstrating it to him, Lilith inadvertently fulfilled the three conditions and became pregnant with Harry, not realizing it until some time afterward.
• Nice Girl: Luz is a walking ball of sunshine. Harry lampshades this, thinking Luz would be a good fit for Hufflepuff, and is doubtful that she has a Friendless Background.
• Nice Job Breaking It, Hero: Thinking that it'll get rid of all the spirits Harry accidentally summoned from the books, Luz brings out none other than Death himself from the same tale as the Resurrection Stone. Death does indeed get rid of all the spirits in quite an eerie fashion. However, whereas the spirits were quite happy to ignore the living, Death actively hunts the kids and tries claim their souls.
• Non-Human Humanoid Hybrid: In this universe, Willow has some dwarf blood from her Papa Harvey, which is why she's surprisingly strong for a witch her age.
• No OSHA Compliance: When Luz asks if the Knight Bus has ever passed a safety inspection, Stan doesn't know what one is.
• Noodle Incident:
  • When discussing school sports spirit, Harry mentions he got set on fire on two non-consecutive occasions during Quidditch season in his first year.
  • Ron mentions a "Christmas Incident", the aftermath of which apparently led to the Burrow having a strict 'no psychological warfare'-policy.
  • Eda implies that she once literally stole candy from a baby.
  • Luz once had an experience at a petting zoo so bad that she now regularly carries emergency sugar cubes in her pockets.
  • The first time King had a sugar rush, he somehow ended up banned from a retirement home and left a sink full of imps.
  • Eda and Stan once got so drunk they wound up stealing King Tut's sarcophagus.
  • Eda's canonical list of misdeeds during her school years now also include "the Hogfather fiasco", a "bell pop war", an Oompa-Loompa infestation, and training an army of imps to form a giant mecha-imp.
  • Harry mentions a classmate who wore his girlfriend's Slytherin scarf to a Gryffindor rally, and something "not pretty" happened to him as a result.
  • According to Ron, Fred and George once almost mailed him to Venezuela.
• Nothing Exciting Ever Happens Here: Eda, knowing nothing about the Wizarding World on Earth before meeting Harry, thinks of England as a dull and dreary place.
• Oh, Crap!:
  • Harry is horrified that he told Luz, a witch's apprentice but not specifically a Witch, about the existence of magic since telling a Muggle could get him in serious trouble with Hogwarts.
  • He has another one later with the spineapple incident, which sees Principal Bump attempt to ban Harry and Luz for good.
  • After defeating Gregore and all his goons, it is only when they hear a faint sizzling that Harry and the others are horrified to remember that there is now no one who could've kept the cage for the Ashbelly cold, leading to it shortly thereafter breaking out in a violent explosion of molten metal.
  • Luz summons Death from the Beedle book in order to deal with the ghosts of dead characters Harry accidentally summoned with the Resurrection Stone from the same, but once they're dealt with he starts coming after them.
• Our Dwarves Are All the Same: On the Boiling Isles dwarves live deep underground and all have beards. They claim to be the first demons to have spawned from the body of the Titan, and are the pioneers of Construction magic. Willow actually has some dwarf blood from her Papa Harvey, making her significantly stronger than you'd expect a witch her age to be.
• Our Ghosts Are Different: The Resurrection Stone Harry obtains via the Wailing Star is unable to revive his parents, so it instead conjures up the spirits of the fictional people who have died in the library's books, forcing Luz to summon Death to stop them.
  • Chapter 24 goes into detail on how Boiling Isles ghosts are different from wizarding ghosts. King even speculates that the two have different afterlives.
• Outside-Context Problem:
  • Harry confounds both Eda and Luz because they've never encountered humans with innate magical abilities before, let alone a disguised community of magical humans just like him. On the flip side, a separate dimension full of magic and demons is something that the Wizarding World hasn't encountered either, as far as Harry and Ron know.
  • The Dementors imprisoned in the Mobile Maze catch everyone off guard, due to being Wizarding World monsters that haven't been seen on the Boiling Isles in centuries. As such, none of the Witches present know how to deal with them and despite being from the same world, Harry and Ron have never encountered them and are therefore equally clueless.
• O.O.C. Is Serious Business: When Eda decides to be responsible for once and actually work to get the kids into Hexside, King is scared. Eda admits she is too.
• Pass the Popcorn: When Eda and the kids start arguing about the latter enrolling at Hexside, King runs off to grab some popcorn to eat while watching.
• Plot Allergy: Lilith is highly allergic to a Demon Realm flower called "Devil's Paw" (which was unfortunate during her Hexside days, since Faust wouldn't allow any other kinds of flowers), that Harry inherited from her. This ends up keeping him, Eda, and Raine from falling under the effects of the Grey Dirge at Faust's funeral, as Eda takes her nephew outside to recover before the band starts playing.
• Point of Divergence:
  • Instead of a warped Otabin created by Edric and Emira vandalizing his book, the threat in "The Wailing Star" is the version of Death from the Beedle book, which Luz summons to deal with all the fictional ghosts accidentally summoned by Harry's attempt to use the Resurrection Stone.
  • Luz discovers the plant glyph in Chapter 20, which takes place shortly after "Once Upon a Swap", whereas in canon she didn't learn it until the events of "Enchanting Grom Fight".
  • In Chapter 24, King finds the fire glyph in addition to the ice glyph Luz finds, giving her all four glyphs ahead of canon. Eda, Edric, and Emira are also captured by a horde of ghosts rather than the Slitherbeast.
• Pragmatic Villainy: Harry assumes the Dursleys only have stopped their physical abuse because he has magic powers and can fight back.
• Put on a Bus: Hermione is implied to have moved outright to France in order to attend Beaubaxtons, presumably due to the troll incident.
• Psychological Projection: When trying to give Edric and Emira a "The Reason You Suck" Speech about their treatment of Amity, Ron ends up derailing into a rant about his relationship with his own siblings, leaving everyone else staring at him in confusion. Luz lampshades it by commenting that he appears to be projecting.
• Pyromaniac: Original villain Gregore is a serial arsonist, who in his second appearance is trying to buy an Ashbelly, a snake demon with fiery abilities, in the middle of town.
• "The Reason You Suck" Speech: In "The Wailing Star", Amity gives one to Harry, telling of how things he deemed harmless have had horrible consequences for her, calling him a bully and a brat who does whatever he wants, never thinking of the consequences and never taking responsibility.
• Ruder and Cruder: At least in regard to The Owl House side of things, considering it's a Disney Channel show. Downplayed in the sense that only minor swears like "hell" and "damn" are sprinkled throughout. The worst swears said so far are "shit" and "piss", and each were only uttered once in Chapter 16.
• Sacred Scripture: The Boiling Isles appear to have one named The Hand's Compendium, probably so named because Emperor Belos and his High Priests seem to be collectively known as "the Hand".
• Save the Villain: Harry actually stops Lilith from killing Vitimir. He says its because killing a Head Witch is bound to have consequences, but his POV makes it clear that murder doesn't right with him.
• Saying Sound Effects Out Loud: When pretending to be a dog on the way to the Burrow via the Knight Bus, King doesn't even bother to bark, he just says “Woof woof. Bark and such." The fact that Stan actually buys it makes Harry wonder if he'd ever graduated Hogwarts.
• Sealed Evil in a Can: The Mobile Maze ruins in Misty Valley turn out to be a prison for an army of Dementors that somehow ended up on the Boiling Isles hundreds of years ago.
• Secret Test of Character: Belos knew about Lilith being pregnant, but kept quiet and continued sending her on dangerous missions to test her loyalty. She ultimately proved it in his eyes by not keeping the baby.
• Serious Business: In "Whispers In The Woods", Luz shares a picture of the notorious black-and-blue or gold-and-white dress with the rest of the Owl House group, triggering a massive debate that soon sees a chair tossed through a window and evidently sets something on fire.
• Shout-Out:
  • When finding out about Harry's first year adventures while meeting Dobby, Luz says that they will talk about it later. Hoot says that Harry will not able to escape, as [ his ] gaze pierces cloud, shadow, earth, and flesh.
  • The janitor at Hexside is named Waldreg.
  • The characters in the story tend to use a lot of lines from other sources, mainly Gravity Falls.
  • One line referenced in the "Dumbass Has A Point" entry here is taken from a LEGO Batman stop-motion video by forrestfire101.
  • When King is telling Harry and Luz about Eda's elixir, Harry mentions that the warnings always come after the spells.
  • The creature beyond comprehension who lives in the Boiling Sea outside of the Owl House is named Mr Dagon.
  • At the Covention, there is apparently a well known Steamed Hams Coven lead by a Head Witch Skinner. He is an odd fellow, but he steams a good ham.
  • Luz saying that she's going to eat King to prevent WWII after coming down from the effects of the Grey Dirge seems to be a reference to when Brian cut off his ear during a hurricane.
  • Ron's description of the history of the Weasley family mincemeat pie recipe has a mention of a relative named José.
  • Bonesborough Library is apparently occasionally visited by a three-hundred pound orang-utan who says "Ook!" and hates being called a monkey. One can only assume that, through L-Space, the Librarian from the Discworld by Terry Pratchett has found his way there.
  • Speaking of Discworld, there are several hints that the holiday celebrating the winter solstice and new year on the Disc, Hogswatch, is also celebrated on the Boiling Isles, with many characters referencing Hogswatch in passing.
  • While waiting for the Blight twins outside Bonesborough Library, Harry and Ron have a familiar-sounding argument about swallows and their ability to carry coconuts. And later when dealing with the ghosts of the Witch King's knights on the Knee, Ron distracts them by quoting the French knights' taunting of the Round Table knights.
  • Raine shares with Harry the story of the Ainulindalë when discussing the power of music.
  • When listing some of the online things that Luz keeps dragging the group into discussions about, Harry mentions Suspicion Island and rumors of a bat-themed vigilante in Gotham.
  • The entire exchange about Monster Island — where Eda assures everyone that it's just a name, only to later clarify that that just means it's a peninsula — is taken from The Simpsons episode "Lisa on Ice".
  • After Gregore and his Mooks are defeated the second time, the last underling standing is smart enough to give up, on the grounds that "I hate working for this guy, he is so weird" before running off.
  • Eda once apparently caused an Oompa-Loompa infestation at Hexside.
  • When Ron explains how magic can bring human technology to life under the right circumstances, Luz questions if her phone is going to turn into Skynet.
  • When Luz fantasizes about becoming a mismatched team with the mean-looking snake palisman No-name, she says they could solve mysteries together like those teens and their talking dog in Crystal Cove.
  • The Bat Queen invokes Morgoth's name as a curse, and Dell mentions how the Ents once walked the Boiling Isles.
  • The Head Witch of the Potion Coven's last name is "Addersfork", which could be a reference to Shakespeare's Macbeth, in which one of many ingredients the Three Witches use in their boiling cauldron is Adder's Fork.
  • When talking about Boiling Isles ghosts and Oracles, both Ghostbusters and Pokémon get mentioned.
• Something We Forgot: Hooray! Gregore is puking slugs and his goons are incapacitated. Wait, remember the giant, ferocious, fiery snake demon locked in a cage that needs to be kept cold at all times? Oh, bugger...
• Spanner in the Works: Faust's plan to get revenge on the Hexside troublemakers at his funeral through the Grey Dirge might have worked if Harry's inherited Devil's Paw allergy didn't send him, Eda, and Raine outside of the chapel before the band started playing.
• Spider-Sense: Ron, who has lived under the same roof as Fred and George all his life, can sense the mischievous Blight Twins approaching by his hair standing on end, telling Luz that his "little brother-senses" are tingling.
• Spotting the Thread: Harry sees Owlbert's unusual intelligence and realizes Luz is a Witch.
• Stealth Hi/Bye: While Gus is guiding the Owl House kids around Hexside, Luz and Harry somehow manage to wander off and disappear from sight while he's looking at them. He's understandably dumbfounded.
• Switching P.O.V.: The narrative does this a lot. Except for a few chapters that only follow the perspective of a single character throughout, we often get things narrated from the point-of-view from multiple characters, one at a time, in the same chapter.
• Tempting Fate: In "The Wailing Star", after having been caught in the library and thinking she has lost any chance of ever befriending Amity, Luz ironically asks "Could this night get any worse?" Seeing Harry and Ron's horrified looks, Luz clarifies that the irony probably means they're safe. They are very much NOT, as the spirits Harry accidentally summoned then comes marching out from the shelves to wreak havoc.
• That Came Out Wrong: When Ron is talking with Eda about Fenrir Grayback, he says that the Werewolf "likes kids", he then hurriedly clarify what he means.
• There Was a Door: When Eda goes to talk to Principal Bump about enrolling the kids in Hexside, she enters his office by means of a Super Window Jump, to which he asks why she did that when she had an appointment and thus no reason to break in. She responds by saying that she always wanted to do that, and figured that it was safer now that he's Principal instead of Faust.
• This Is Wrong on So Many Levels!: This is Luz's reaction to Eda checking her body out after Body Swapping with Harry. While Luz is in said body, mind.
• Took a Level in Badass: Luz, Harry and Ron all level up during Chapter 20 — Luz discovers the plant glyph (well ahead of canon), Harry activates inherited Beast Keeping magic that gives him Innate Night Vision, and Ron finally gets a handle of the Abomination magic he's been studying in secret, learning how to create small ones.
• Torches and Pitchforks: While in Ron's body during chapter 17, King somehow causes enough trouble that he gets a torch-and-pitchfork carrying mob after him. It's never quite explained how, but it's remarked that many in the mob are puking slugs and they even call King (in Ron's body) the "Red Slug Sorcerer".
• Trauma Swing: The Fic opens with Harry on a swing, reeling from the Dursleys and his loneliness.
• Unequal Rites:
  • Eda is rather unimpressed by how Human Wizards usually need to use wands to cast spells, since in the Isles wands are simply training tools used by young Witches and Witches can cast spells solely by drawing a spell circle for the desired spell, and even Harry has to admit (when seeing the goons Gregore hired), that the magic of the Isles seems powerful. Upon meeting Hedwig, she also takes a moment to rub in how her Palisman Owlbert can become a flying Magic Staff while the other owl can't. When Eda has to admit that they have one thing over the Boiling Isles system in that they let Wizards use any kind of magic instead of limiting it to a single type like with the Coven System, she feels like she's going to throw up.
  • About the one thing that readily available Wizard Magic can do Boiling Isles Magic can't is reliable long-distance teleportation magic, Darius's canonical trick of using Abomination magic to travel through the ground being a fairly new invention that's still in development.
• Verbal Backspace: When Willow's Papa Harvey is reflecting on his school days and the rivalry between Hexside and Glandus, he happily mentions a time he and his classmates burned down Hexside's assembly hall. When his husband glares at him for saying that in front of the kids, he quickly backspaces and tells them that it was a terrible thing that they should never do.
• Wham Episode:
  • In "Covention Confrontations", it's confirmed that Harry is Lilith's biological son. Harry takes an interest in Bard Magic after an encounter with Raine Whispers, and Ron decides to try his hand at Abomination magic.
  • In "Moonlit Midnight Madness", Eberwolf makes a surprise appearance and helps turn the tables on the Demon Hunters, and later realizes that Harry is Lilith's son from his scent, telling Darius at the end of the chapter as well as taking an interest in learning Parseltongue.
  • In "The Care Package", Scabbers arrives on the Isles, having hitched a ride in the titular care package, and Luz reveals how her father died to the other kids.
  • In "The Wailing Star", we learn from a few vague words from the Bat Queen that there have been at least two wizards from the human realm to the Boiling Isles before.
  • In "Monster Island Meet-Ups", Eberwolf manages to start copying Parseltongue from Harry, and the maze is implied to contain a Dementor.
  • "The Wraith" follows up on the above, revealing that the maze actually contains an army of Dementors. But on the bright side, Luz discovers the plant glyph ahead of canon, Harry activates inherited Beast Keeping magic, and Ron masters the basics of Abomination magic he's been studying in secret.
  • "The Forest Of The Forgotten" adapts the canon episode "Escape of the Palisman", but has some significant differences — the kids meet Dell a full season before his canonical first appearance, the Bat Queen explains a bit more about her wizard visitors, and in a cliffhanger ending the kids return to the Owl House to find that Eda's transformation into the Owl Beast hasn't been undone, and Lilith is present.
  • In "Writers' Block And A Fetch Quest" Eda is restored to normal, though on limited time. Lilith finds out about how Voldemort gave Harry his scar, as well as appearing to sense a "darkness beyond darkness" inside it, clearly referring to the Horcrux. Deciding that she wants it out of Harry, Lilith tells Belos about how her son survived the Killing Curse, putting Harry on the Emperor's radar.
  • "The Knee" has Luz discover the Ice glyph, while King finds the Fire glyph, giving Luz all four glyphs ahead of canon.
• What the Hell, Hero?: Ron explodes on Gus when he realizes he lied about getting Luz and Harry's bans lifted.
• Whole Episode Flashback: "The Witch & The Wizard" is entirely shot in the past, showing how Lilith and James met, and the circumstances that led to Harry's magical conception and birth.
• Wrong Context Magic:
  • The magic that human wizards use is seemingly a different variety than the Boiling Isles witches can do, as Harry presumably lacks a bile sack like they do, and wizards being able to reliably use a spell without a wand like the latter does constantly is a fairly rare skill. Interestingly, when Eda is explaining the light spell Harry reflexively starts moving his finger in a circle and generates a malformed spell circle that just fizzles out, with Eda noting that it's like his magic didn't want to be in one. Ron can't do this, so it seems to be unique to Harry.
  • While Beastkeeping Magic can give a witch increased understanding of the behavior and feelings of creatures, there's no beastkeeping spell that lets a witch talk to one like Harry can communicate with snakes via Parseltongue. When Eberwolf hears Harry talking in Parseltongue in "Moonlit Midnight Madness", they immediately take an interest in learning it themselves, and succeed in replicating it to a degree by copying Harry in "Monster Island Meet-Ups", though it's clear that they're just copying Harry like Ron did in canon.
  • Apparition is something completely alien to the Boiling Isles residents.
• You Know the One: The two human wizards who visited the Boiling Isles are only referred to by the Bat Queen as "Cat's brilliant boys", of course leading to the question of who this "Cat" is. Even when she explains in a later chapter that Cat was a palisman carver and close friend of hers, with the "brilliant boys" being human wizards that visited the Demon Realm, she refuses to name them out of grief, still leaving their identities a mystery.
• Your Mom: In Chapter 21, Eda teaches Harry a song that, going by the lyrics shown, is basically a prolonged mom joke.

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