Riddikulus is the spell that's used when facing a Boggart, and it's used to turn the Boggart into something that the caster finds funny.
Tarantallegra. There are quite a few weird spells in the wizarding world, but perhaps the weirdest is Tarantallegra. It's similar to Rictumsempra in that it incapacitates and enemy in an unexpected way. This spell causes the target to suddenly start tap dancing and not be able to stop.
Neville casts this spell. Riddikulus is a charm that is used in defence against a Boggart. It causes the creature to assume a form that is humorous to the caster, thereby counteracting the Boggart's ability to terrorise.
In Harry Potter, Riddikulus is a spell used against Boggarts. For the magic to work, you have to think of something funny while casting it. If it works, it makes the boggart take the shape of whatever you were thinking of and because Boggarts feed on fear, they're defeated by laughter.
Based on Harry Potter lore, and an article by The Healthy Journal, Draco's signature spell is a N.E.W.T standard spell, The Protean Charm.
Densaugeo is a hex which causes the teeth to elongate at a grotesque, alarming rate. The Shrinking Charm can be used to counteract this spell.
Densaugeo was the incantation of a hex which caused the front teeth to elongate at an alarming rate.
The words "god" and "oh god" can be heard. Ron says "bloody" and "bloody hell" a few times. Aunt Marge uses the word "bitch" while telling an anecdote about dogs comparing them to Harry and his mother in the first scene, but in the context of referring to a female dog rather than as an insult.
The Patronus Charm is perhaps the most notorious difficult-to-cast spell in the wizarding world, and it's certainly the first one to come to mind for most fans. The Patronus Charm requires the caster to hold on to a moment of pure happiness—as in, they must think of their happiest memory.
Avada Kedavra
Topping the list for the most powerful spells in the Harry Potter universe is no other than Avada Kedavra, Voldemort's favorite to instill his will and fear onto others. The spell itself is a play on Abra Kadabra and is easy to cast by just about anyone in the Wizarding World.
Overview. The Deletrius charm ends the display of previously-cast spells from a wand, that was previously triggered by use of the Prior Incantato charm.
A charm to confuse and befuddle, the Confundus Charm was used to trick people into thinking something about themselves or their surroundings. The spell can also be used on magical objects with some form of sentience, such as the Goblet of Fire.
Roughly translated, Expelliarmus – the Disarming Charm – means 'to drive out a weapon' and that's what it does: forces the subject to drop whatever they're holding. Usually that's a wand, which is why it's often seen in duels, and Harry definitely took that to heart, given how much he used it in combat.
Ginny and the Bat Bogey Hex
As the youngest Weasley, we're sure Ginny observed more than her fair share of unpleasant spells over the years but it was the Bat Bogey Hex she was famous for – and with good reason.
What Spell Does Hermione Cast On Her Parents? In Harry Potter and the Deathly Hallows — Part 1, the war with Voldemort (Ralph Finnes) is getting worse, and Hermione casts the spell Obliviate on her parents because she's terrified that he will discover them. This means that they don't remember her or know who she is.
Hermione's bluebell flames
Hermione first uses it against Snape when she and Ron think he is cursing Harry's broom in his first Quidditch match. Her bright blue flames set Snape's robes alight, before Hermione scoops them up and puts them into a jar.
The counter spell to Lumos, Nox extinguishes light from the end of the caster's wand. The incantation comes from the Latin for 'night' or 'darkness'.
Alohomora is the spell used to open locked doors in the wizarding world.
Diffindo is a destructive spell. It can be used to make seams rip and books separate from their bindings; its effects can be reversed by the Reparo charm.
She stared Bellatrix down and challenged her to a one-on-one duel. Molly Weasley had hit Bellatrix Lestrange straight in the heart with an unspecified spell and killed her on the spot. Since Avada Kedavra is an unforgivable curse, many fans have argued that it is not what Molly used.
The darkest of the Dark Arts, Harry Potter unforgivable curses are the Cruciatus Curse, the Imperius Curse, and the Killing Curse. Although the curses are highly illegal, Harry using Unforgivable Curses happened, but he uses them once he was thrust into the Second Wizarding War.
In the Harry Potter series, Bellatrix Lestrange used the spell "Avada Kedavra" to kill Sirius Black.