Harry did not cast any spells in first movie. We first see him casting spell “Rictesempra” while dueling in second movie. Fun fact: First verbal spell was “occulas reparo” by Hermione on train.. First non verbal was “Incendio” by Hagrid when he was there to fetch Harry in that cottage.
Although “Rictusempra” is Harry's first successful spell, he becomes more notable for two other big charms: the Disarming Charm “Expelliarmus” and the Patronus Charm “Expecto Patronum.” In fact, Harry was only supposed to use a disarming spell when dueling Draco Malfoy in the Chamber of Secrets, so his first spell ...
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.
We're not going to deny that Expelliarmus was Harry's signature spell. Lupin said so, after all, and given it was the spell Harry used to ultimately defeat Voldemort, he was not wrong.
One of Harry's go-to defense spells, Expelliarmus is an absolute classic that whips your target's wand out of their hand. If the opponent is holding some other item, Expelliarmus will also work to remove that from their possession as well.
It might be a relatively simple spell but do not underestimate the power of the Disarming Charm. There's a reason it became Harry's signature move… this spell will knock another wizard or witch's wand out of their hand.
Shortly before the Battle of Hogwarts, Harry not only successfully used the Cruciatus Curse against Amycus Carrow, he also cast the Imperius Curse against two individuals during the Gringotts heist which allowed Harry, Hermione, and Ron to get inside the Lestrange Vault.
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.
In the final movie, Harry Potter and the Deathly Hallows pt. 2, Molly first hits Bella with a spell that freezes her, most likely Petrificus Totalus. Then, she launches another one that shatters her entire body into pieces, which could be expelliarmus, bombarda, stupefy, or any spell that can produce such an effect.
The Disarming Charm became Harry Potter's signature spell, and it notably caused the final defeat of Lord Voldemort during the Battle of Hogwarts by rebounding his Killing Curse, because the Elder Wand recognised Harry as its master through the spell connection, and thus strengthened the Disarming Charm to the point ...
It was Snape who taught Harry his signature spell: Expelliarmus. During Duelling Club in Harry's second year, Snape used the Disarming Charm against Lockhart.
Hermione cast a bluebell flame that could be carried around in a jar. She used it to set Snape's robes on fire during the match between Gryffindor and Slytherin of her first year. Hermione used this spell against Devil's Snare when she, Harry, and Ron worked through the challenges surrounding the Philosopher's Stone.
Green is one of the two most prominent spell colors in the story for sure, with the other one being red. This is based on the fact that the main character, Harry, uses the red Expelliarmus, while green is the signature color of his nemesis Lord Voldemort, when using Avadakedavra.
While there were a great many spells which were used regularly throughout the franchise, it was "Stupefy" which was most prolific, being used almost thirty times across the movies.
Death Eater Bellatrix Lestrange was a well known practitioner of the Cruciatus Curse, where she would torture numerous victims to her immense satisfaction; thus this curse could be assumed to be her signature spell.
Snape's death by Nagini highlighted his loyalty to Dumbledore and Harry, showing his true allegiance in the end. Voldemort used Nagini to kill Snape instead of Avada Kedavra, possibly signaling a hidden respect or hope for Snape.
Draco Malfoy. Hermione Granger. Malfoy first called Hermione a "Mudblood" in 1992; this was also the first time Harry Potter ever heard the term. Malfoy also called her a "Mudblood" on many other occasions.
He is also revealed to be a double agent for Albus Dumbledore and the Order of the Phoenix. But many people forget that he also invented a number of spells. In the Harry Potter movies, Snape came up with the Sectumsempra curse when he was a student at Hogwarts, and it's known to cause painful lacerations on the target.
The book and the films diverged. In the book he is not hit with the killing curse. I believe in the movie he is. In the book, the curse that hits Sirius is not identified (although it is rumoured to be Stupefy because of the red light), and him being knocked through the Veil is what causes his death.
Harry truly realizes this when he casts the Cruciatus Curse on Amycus Carrow after Carrow spits in the face of Professor McGonagall in the Ravenclaw dormitory, stating his understanding of the anger one must feel to make such a curse be effective.
The most dangerous spell in the Harry Potter series is Avada Kedavra (the Killing Curse). This spell is one of the three Unforgivable Curses, and it causes instant death to the victim.
