Draco Malfoy (Cruciatus & Imperius Curses)He's never seen using the Killing Curse, but under strict orders from Voldemort, he's known to have used the other two.
Throughout the 1996-1997 school year, Draco Malfoy used the Imperius Curse on both Katie Bell and Rosmerta, and unsuccessfully attempted to torture Harry with the Cruciatus Curse, as he was severely injured by the Sectumsempra curse casted by Harry.
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 second Unforgiveable Curse, Cruciatus causes such excruciating pain that when Voldemort used it on Harry, it was 'so intense, so all-consuming, that he no longer knew where he was…'
in the torture Neville's parents by means of the Cruciatus Curse, leaving them permanently incapacitated in St. Mungo's. When Bellatrix escaped from Azkaban prison in January 1996, Neville was heavily affected.
Although it is not confirmed to have been the Killing Curse, it is highly likely that Ron attempted to kill Voldemort's snake, and last Horcrux, Nagini, with Avada Kedavra. This is because, in the movies, Ron can be seen firing out a green spell at the snake, and it looks just like the Killing Curse.
There is likely a good reason that the Sectumsempra is not an unforgivable curse. It's mostly because Sectumsempra is Snape's personal curse that he created. It is not a widely known or used spell, and it is one that he kept secret — which means it can't be added to the list since no one really knows about it.
Also known as the Leg-Locker Curse, this spell is used on Neville by Malfoy, although we don't know the incantation until Hermione whispers it to Ron. They plan to use it on Professor Snape if he attempts anything against Harry during a Quidditch match, but as it turns out, they don't need to.
Nevertheless, while the impact of Avada Kedavra was unforgettable, Crucio was far more deadly than that, and Imperio as it could make a victim beg for death solely to stop the pain.
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.
Dolores, though, wrongly believes him to be attempting to speak to Dumbledore - who is wanted by the Ministry of Magic for treason. In order to coax information from Harry, Umbridge demonstrates a willingness to use the Cruciatus Curse to 'loosen his tongue'.
Personality. Draco is the prototypical spoiled, rich brat; he believes that his family's wealth and social position gives him the right to bully those poorer than himself, such as Ron Weasley.
It's safe to assume that Draco's hatred of Harry was fueled by jealousy. Although Draco attempted to disguise his jealousy with confidence, it still makes an appearance throughout the franchise.
In the films, Sectumsempra appears as a small flash of white light which causes a cut when it strikes the target. In LEGO Harry Potter: Years 5-7, Harry uses Sectumsempra on Malfoy only to find out the spell has, apparently, painlessly sliced him in half.
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.
Malfoy called Hermione a "Mudblood" in 1992; this was the first time Harry Potter ever heard the term. Malfoy also called her a Mudblood, and used the term more generally, on many other occasions.
His tears were due to the fact that since the bird had died, he had failed once more to repair the Vanishing Cabinets. Draco needed to repair them in order to give the Death Eaters a safe way to infiltrate Hogwarts. Failure meant death, Voldemort had made that very clear.
Vulnera Sanentur was the song-like incantation of a healing spell which was used to heal deep wounds, which could also be used as the counter-curse for the curse Sectumsempra.
Effect. Unforgivable Curses are the three most powerful and sinister spells known to the wizarding world, and are tools of the Dark Arts. They were first classified as "Unforgivable" in 1717. They are the Killing Curse, Avada Kedavra, the Cruciatus Curse, Crucio, and the Imperius Curse, Imperio.
It did backfire on Voldemort but just not the degree it did the first time. It failed to destroy his body because it killed the piece of hit soul that was in Harry forming the horcrux but it did knock him off his feet and actually rendered him senseless.
In the film, Bellatrix casts a blue spell at Ginny Weasley instead of a Killing Curse, who deflects it using a Shield Charm. In the book she just avoids it.
