That said, there are degrees of difficulty when it comes to casting the Unforgivable Curses. The Imperius Curse is presumably the easiest, followed by the Cruciatus Curse, and, finally, Avada Kedavra.
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.
Riddikulus
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.
The Killing Curse ('Avada Kedavra')
Obviously there's no coming back from this spell, and according to the Ministry of Magic's classifications (and, again, fake-Moody) this is the worst Unforgivable Curse.
1 Avada Kedavra
The most formidable of the unforgivable curses is Avada Kedavra. It is dubbed the killing curse for good reason - it will kill any enemy in just one hit, making it the strongest spell in the game.
7 Draco Malfoy: The Protean Charm.
The three curses that are classified as Unforgivable are the Imperius Curse, the Cruciatus Curse, and the Killing Curse. Mad-Eye Moody introduces Harry and his class to these curses in Harry Potter and the Goblet of Fire.
Avada Kedavra
It's used to kill people, it's an Unforgivable Curse, and it was Voldemort's favourite, so it's going last.
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.
Harry became so enamoured with the spell that he eventually used it to finish off Lord Voldemort. Here's how Harry's relationship with Expelliarmus became his signature – and why that's a good and bad thing.
Firestorm. Firestorm was a spell that created a large ring of fire around the caster's wand. This spell is one of the last and most powerful spells that Albus Dumbledore cast using the elder wand before his death.
In top position is the Tales Of Beedle The Bard, a children's book that is featured in the last movie in the Harry Potter franchise, Harry Potter and the deathly hallows.
One of the oldest spells in the Wizarding World, Accio is taught to Hogwarts students during their fourth year. Perhaps its most memorable use in the series is Harry's summoning of his broom during the Triwizard Tournament, and of the Triwizard cup after the resurrection of Voldemort.
Hermione's bluebell flames
Hermione's magical talents meant she was good at every spell, right from the beginning – Wingardium Leviosa, anyone? But the bluebell flames she once used against Snape became one of her trademarks, and it's also one of our favourites.
1. Avada Kedavra. No prizes for guessing that the deadliest of them all would be this one. Avada Kedavra, or the Killing curse, is another Unforgivable curse, the most dangerous one ever.
The Engorgio charm is used to make things larger; it is possible, though not certain, that it is the same as the Engorgement Charm that Hagrid is using on his pumpkins in Harry Potter and the Chamber of Secrets.
The three Unforgivable Curses in Harry Potter are Crucio, Imperio, and Avada Kedavra, and all three are available to Hogwarts Legacy players. Crucio subjects the victim to extreme torture, while Imperio puts them under the control of the spellcaster.
Malfoy spots Harry and casts a Cruciatus curse; Harry, defending himself, using the Half-Blood Prince's Sectumsempra spell without knowing its effects. To his horror, it gashes Draco's face and chest, spilling his blood everywhere. Moaning Myrtle flies off, screaming.
The first time Harry cast Cruciatus was in Harry Potter and the Order of the Phoenix when Harry Potter uses Crucio on Bellatrix Lestrange after she killed Sirius Black in the Department of Mysteries.
Voldemort's greatest fear is death and as a result a boggart takes the form of his own corpse. It is unsurprising that this is Voldemort's biggest fear. After all, he did split his soul up encasing it in various horcruxes just so to keep himself from dying.
What Is Dumbledore signature spell? There were two; Apparation and Invisibility. Dumbledore must have used these particular skills thousands of time in his lifetime for any number of purposes. His vast gathering of knowledge probably came as a result of his skill in appearing and disappearing at will and unseen.
To create a Horcrux is to commit a horrific sin in the wizarding world. A Dark wizard of yesteryear called Herpo the Foul was known as the first to dabble with Horcruxes and would be one of the rare ones to do so. For this magic involves carrying out a terrible atrocity, which then begins to tear apart your soul.
The spell that Dolohov hit Hermione with was actually purple: But the Death Eater Hermione had just struck dumb made a sudden slashing movement with his wand; a streak of what looked like purple flame passed right across Hermione's chest.
I've always suspected Molly's lethal spell was a particularly well-placed and powerful stunner that stops Bellatrix's heart, which is consistent with the description of her death: Molly's curse soared beneath Bellatrix's outstretched arm and hit her squarely in the chest, directly over her heart.
Voldemort killed Snape in Harry Potter And The Deathly Hallows Part 2 using his Horcrux snake Nagini instead of his favorite Unforgivable Curse, Avada Kedavra.