History Fanfic / HarryPotterAndTheBoilingIsles

* ForWantOfANail: 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".

* OutsideContextProblem: Harry confounds both Eda and Luz because they've never encountered humans with innate magical abilities before, let alone [[{{Masquerade}} 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.

* HellHotel: Eda and Luz, with Harry in tow, take Harry to the Boiling Isles through one of these.

** 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 he's just copying Harry like Ron did in canon.

** 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.

** 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.

* HeightAngst: Harry is ''very'' happy to end up in Luz's body during the FreakFridayFlip 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.

* EverybodyKnewAlready: 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.

* ThisIsWrongOnSoManyLevels: This is Luz's reaction to Eda [[DistractedByMyOwnSexy checking her body out]] after Body Swapping with Harry.

* NoodleIncident: Ron mentions a "Christmas Incident", the aftermath of which apparently led to the Burrow having a strict 'no psychological warfare'-policy.

* MamaBear: 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.

* BilingualBonus: 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 InUniverse it translates to "Better a robber in the pool than a pole in the ass".

* HorrifyingTheHorror: Trivia/WordOfGod has it that even Voldemort wouldn't ally with the giraffes.

* FantasticMeasurmentSystem: 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.

** 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.