History NightmareFuel / FantasticBeastsAndWhereToFindThem

* Small potatoes compared to the others, but the Fwooper is a small, cute bird whose song, though pleasant at first, [[BrownNote will slowly drive its listener to insanity]]. It's also [[NothingIsScarier never explained how or why the song does this]]. Fortunately, this can be avoided by placing a silencing charm on the bird, though the charm wears off after a while, requiring monthly reinforcement.

* Ashwinder eggs can burn down a building in minutes.

* Puffksein are harmless balls covered in soft fur and beloved children's pets, but Ron mentions Fred and George used ''his'' for Bludgers - beating it to death with their reinforced Beaters' bats.

* The Lethifold sneaks up on unsuspecting victims and smothers them in their sleep. And ''digests them on the spot and leaves no evidence of their demise''. They also have a [[ItCanThink deceptive cunning to boot]] which, coupled with the fact that they can blend in with a fairly large range of things, [[ParanoiaFuel means that they could be anywhere]]. And they can only be driven off by a Patronus, which is extremely difficult to summon. And even that might not help, because it habitually attacks the sleeping so it can smother and eat a victim before they could reach their wand.
** And for some nice FridgeHorror: Consider how many Muggles living in its habitat (which thankfully is limited to the tropics) may have been devoured by it without any witnesses or clues. Their family and friends would never know what happened to them. Were they kidnapped? Did they run away? ''Why?'' Are they still alive? A loved one could easily be haunted by such a mystery for the rest of their lives. Even if they were wizards and knew of Lethifolds, they could never ''really'' know if the victim was eaten by one or if something more conventionally sinister happened... and again, by extension, whether they were still alive.
** The footnote even points out that it's nigh-impossible to count just how many people were eaten by Lethifolds, with an easier number being people who ''fake'' Lethifold attacks for one reason or another. Hell, Lethifolds could be a BeethovenWasAnAlienSpy explanation for real life disappearances from tropical locations that left no traces. And considering the habitat, imagine how many of these disappearances would have been a dark, tragic turn to a nice vacation. [[ParanoiaFuel Still feel like taking that trip to Cuba?]]

** And for some nice FridgeHorror: Consider how many Muggles living in its habitat (which thankfully is limited to the tropics) may have been devoured by it without any witnesses or clues. [[AdultFear Their family and friends would never know what happened to them.]] Were they kidnapped? Did they run away? ''Why?'' Are they still alive? A loved one could easily be haunted by such a mystery for the rest of their lives. Even if they were wizards and knew of Lethifolds, they could never ''really'' know if the victim was eaten by one or if something more conventionally sinister happened... and again, by extension, whether they were still alive.

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/obscurial_fantastic_beasts_2.png]]
[[caption-width-right:350:Never manipulate an orphan. Trust us.]]

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/obscurial_fantastic_beasts_2.png]]
[[caption-width-right:350:Never manipulate an orphan. Trust us.]]

* [[BigBad Percival Graves]] is quite a chilling character in his own right. He's a soft-spoken but clearly [[OneManArmy very powerful]] wizard with no qualms about extreme measures to carry out his goals, such as manipulating Credence in a manner [[DoesThisRemindYouOfAnything disturbingly reminiscent]] of a sexual predator, talking about the potential "uses" for an [[EldritchAbomination Obscurus]], or sentencing Newt and Tina to a summary execution without trial. The fact that he's actually [[CanonCharacterAllAlong Gellert Grindelwald]] in disguise just makes him all the more frightening.
** At one point while fighting Newt, Graves attempts to kill him by [[PsychoElectro electrocuting him]]. The electrocution is neither quick nor [[ElectricTorture painless]], leaving Newt writhing in pain as Graves refuses to let up.
** Just as a prelude to how powerful Grindelwald really is, Graves easily overpowers Tina in a one-on-one duel and, later, holds his own against an entire squadron of Aurors, each one rapid firing without incantations, and clearly would have won if it hadn't been for Newt. And this is Grindelwald ''without'' using the Elder Wand. [[ForegoneConclusion When]] Grindelwald escapes, life will get a lot harder for a lot of people.

** Grindelwald's plot: To manipulate an Obscurial into becoming a weapon for him. Had he succeeded, the previous generation's Voldemort would have had his own EldritchAbomination to loose on his enemies or even just hapless bystanders caught in the crossfire.