He first demonstrates the Imperius Curse, which allows the curser to control the cursed. This is the curse that Voldemort used to put wizards under his control). He then shows the Cruciatus Curse, which causes terrible writing pain to the cursed, and which upsets Neville tremendously when he sees it done to the spider.
The second spider was tortured by the Cruciatus Curse, much to the discomfort of Neville Longbottom as his parents were tortured into insanity with this curse by Death Eaters (unknowingly, one of those Death Eaters was standing right in front of him), and only stopped at Hermione Granger's behest.
What did the cruciatus curse do to Neville's parents?
Their prolonged exposure to the Cruciatus Curse caused them to lose their minds and their magical powers. But nevertheless, Neville continued to visit them regularly and believed that his parents still loved him even if they couldn't recognize or communicate with him.
For example, when Imperiused, Neville Longbottom was able to perform a series of "quite astonishing gymnastics" under the curse that he would not normally be capable of. It is possible for someone who has been Imperiused to place others under the curse as well.
Because Bellatrix LeStrange and Barty Crouch, Jr tortured Neville's parents into insanity with it. That's why Neville is being raised by his grandmother. Why did Hermione use the Body-Bind Curse on Neville instead of just taking him with them?
However, Harry felt no pain because the wand Voldemort used, the Elder Wand, refused to harm its true master, though Harry's body was still tossed around by the force of the spell.
Due to his humiliation in the Triwizard Tournament, Cedric eventually becomes a Death Eater and kills Neville Longbottom. Due to Neville's death, the final Horcrux Nagini was never destroyed, and as a result Voldemort is never defeated, kills Harry and takes over the Wizarding World.
Their unfortunate fate proves that while victory eventually went to the Order, there were several casualties along the way. After being captured by Voldemort's army during the war, Frank and Alice were tortured by Bellatrix Lestrange and the Death Eaters in order to punish them for their misplaced loyalties.
After the Wizards' Council was reformed into the Ministry of Magic, tighter restrictions were placed on the use of certain kinds of magic. The Imperius Curse was deemed by the Ministry to be Dark magic, and, along with the Cruciatus and Killing Curses, were declared "unforgivable" in 1717.
While most fans agree that Harry is the unrefuted Chosen One, the final Deathly Hallows film (in particular) sways heavily toward highlighting a heroic Neville, revitalizing the debate regarding which boy is better suited for the iconic title. "The one with the power to vanquish the Dark Lord approaches ...
Voldemort made some crucial choices upon hearing the prophecy, and these choices were his own undoing. Voldemort's own narcissism caused him to choose Harry as he was half-blood like Voldemort, and this meant he viewed him as his equal. Also, Voldemort's first choice to follow the prophecy was the cause of his undoing.
In 1981, shortly after Voldemort's first defeat, Crouch allegedly participated in the capture and torture of Frank and Alice Longbottom along with the Lestranges, using the Cruciatus Curse to drive the two Aurors to insanity.
Neville Professor Snape Neville fears Professor Snape who treats him rudely with sarcastic comments. Neville seems afraid of this harsh treatment that makes him feel inferior constantly.
He was cruel to many students, but especially toward Neville Longbottom. It was no fault of Neville's but was instead because of Snape's love for Lily. Neville was almost the Chosen One, and the fact that he wasn't broke Snape's heart to look at him, which caused Snape to lash out cruelly at an innocent child.
Lucius Malfoy was one of the many Death Eaters who denied their allegiance to Voldemort after the end of the First Wizarding War and therefore would be a perfect example of the kind of person Barty Crouch Jr. hates the most.
Though Voldemort apparently punishes Bellatrix and the Malfoys severely for interrupting his Elder Wand side quest only to have Potter escape and steal the cup, she nevertheless fights for her master in the Battle of Hogwarts towards the end of the novel.
Harry describes Umbridge to Sirius Black, saying that she's vile enough to be a Death Eater, despite not being one. Umbridge is also depicted to be a prejudiced person, despising half-breeds and Muggle-born witches and wizards to the point of firing Hagrid due to his half-giant birth status.
Alice and Frank Longbottom were not killed. They were tortured with the Cruciatus Curse to the point of insanity. It was a combination of Bellatrix Lestrange, Rodolphus Lestrange, Rabastan Lestrange, and Barty Crouch Jr.
Seething with fury at his humiliation, Cedric ended up joining the Death Eaters come Voldemort's return. As a result, during the Battle of Hogwarts, Cedric Diggory killed Neville Longbottom before he could destroy Nagini, thus keeping Voldemort immortal and allowing him to kill Harry Potter.
“He wants to have a stable job at Hogwarts. And Luna is a bit too kooky and out there for him and she wants to go out and travel the world. And their lifestyles just wouldn't mix.
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 ...
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'.
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.
