The killing curse (Avada Kedavra) was a tool of the dark arts and one of the three unforgivable curses.
1 Avada Kedavra Is Just Ridiculous
Only love itself, the strongest magic of all, can block the Killing Curse. Lord Voldemort cast this spell constantly in his lifetime, and it's the spell that killed Harry's parents in particular.
The three curses that are classified as Unforgivable are the Imperius Curse, the Cruciatus Curse, and the Killing Curse.
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. While this is definitely a useful and necessary spell in this one situation, it's a rather weird idea.
Therefore, figuring out a spell that is Draco's favorite is hard and, in the movies, there is no defining moment that cements a spell as his favorite. 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.
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.
Cruciatus Curse ('Crucio')
Harry tried to use this spell himself. The first time was against Bellatrix after she had killed Sirius. His attempt was unsuccessful because, as Bellatrix mockingly explained: 'You need to really want to cause pain – to enjoy it – righteous anger won't hurt me for long…'
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.
Avada Kedavra, also known as the Killing Curse, kills a person instantaneously and without injury.
Avada Kedavra
It's used to kill people, it's an Unforgivable Curse, and it was Voldemort's favourite, so it's going last.
Those that are gifted with the power of flight are perhaps more rare than any other wizard that has any other power. Able to fly purely because of their own powers and not reliant on any type of enchanted item or spell at all, the number of these special wizards known to exist can be counted on one hand.
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.
The Killing Curse is a spell that causes instantaneous death and is one of the three Unforgivable Curses. Its incantation is Avada Kedavra. The only known counter-spell is sacrificial protection, which uses the magic of love.
The three Unforgivable Curses are the Cruciatus Curse, which causes unbearable pain; the Imperius Curse, which allows the user to control the actions of the victim; and the Killing Curse, which causes instant death.
History Of Avada Kedavra
The Killing Curse was created in the early Middle Ages by Dark witches and wizards. Primarily, the curse was used to quickly slay opponents during a duel.
Sectumsempra is a curse invented by Professor Severus Snape, during his childhood, when he was known as "The Half-Blood Prince". He created it with the intention of using it against his enemies, and it soon became one of his specialties.
Using the highly advanced art of spell creation, Voldemort was able to create four spells/magical items unique to him alone. These included being able to fly under his own power, creating the infamous drink of despair, the rudimentary body potion, and morsmordre.
The Imperius Curse is one of the three so-called “Unforgivable Curses” that, when used on another human being, warrant the user a life sentence in Azkaban.
None of the good guys dare use the Killing Curse throughout the events of the movies and books, no matter how high the stakes and how difficult things are. But Ron Weasley is the exception, giving it a go in the Deathly Hallows: Part 2 movie when himself and Hermione look destined to die via Nagini.
Blood spurts from Draco's face and chest, and Myrtle beings screaming. Snape bursts into the room and heals Draco's wounds almost immediately.
Alohomora, which is a spell that unlocks objects (and it's also Hermine Granger's signature spell).
Her sacrifice gave Harry the power of love, a protection spell sealed with the blood spilled by her death.
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.