Amato Animo Animato Animagus is the only known incantation with four words. It therefore is also the longest incantation revealed.
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.
1 Stupefy Is Cast Twenty-Nine Times
Stupefy, also known as the Stunning Spell is the most frequently cast verbal charm in the Harry Potter series, being performed almost thirty times during the franchise.
Engorgio is a spell that enlarges an object. It means 'To Fill In'.
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.
7 Draco Malfoy: The Protean Charm.
Avada Kedavra
It's used to kill people, it's an Unforgivable Curse, and it was Voldemort's favourite, so it's going last.
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.
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.
Priori Incantatem, also known as the Reverse Spell, is a magical spell in the Harry Potter universe that reveals the most recent activity of a wizard's wand.
Extended Description. The three curses that are classified as Unforgivable are the Imperius Curse, the Cruciatus Curse, and the Killing Curse.
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.
Hermione's de facto signature spell is 'Bluebell Flames', also known as 'Cold Flames'. The incantation is unknown but is at least 2 words long. Hermione uses it 4 times: Once to set Snape's robe on fire in the Slytherin-Gryffindor Quidditch Match in their 1st Year.
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.
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.
Snape save Draco by using Vulnera Sanentur spell. 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 intentions of using it against his enemies and it soon became one of his specialties."
Sectumsempra | Harry Potter and the Half-Blood Prince - YouTube.
The freezing spell Dumbledore cast on Harry is broken when Dumbledore is killed, and Harry bursts into action immediately, doing his best to control the situation and prevent it from getting any worse.
Godrick Gryffindor, one of the four founders of Hogwarts, and the owner of the legendary Sword of Gryffindor, was absolutely more powerful than Dumbledore— and it's a good thing he was, too, because Dumbledore wasn't around in Hogwarts' early days to keep Godrick's fellow founder Salazar Slytherin in check.
Snape used the Avada Kedavra curse to kill Albus Dumbledore.
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…'