They are the Killing Curse, Avada Kedavra, the Cruciatus Curse, Crucio, and the Imperius Curse, Imperio.
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.
Confringo. Commonly known as the Blasting Curse, Confringo causes the target to explode. To make it even more dangerous, it produces flames that ignite upon contact with the target. If Confringo fails to kill the target immediately, they will instead suffer a slow and painful death.
In Harry Potter and the Order of the Phoenix, Harry attempts to use the Cruciatus Curse against Bellatrix Lestrange, in self-defense, but fails.
Along with the Cruciatus Curse and the Imperius Curse, Avada Kedavra is considered to be one of the most terrible curses in the magical world, called the Unforgivable Curses; the use of any of the three on another witch or wizard is punishable by a life sentence in Azkaban.
Some would say there's no spell worse than Avada Kedavra, the Killing Curse that Voldemort used so indiscriminately.
Harry makes use of two of the Unforgivable Curses in the books. Dueling with Bellatrix Lestrange, he attempts the Cruciatus curse, with limited results; Bellatrix says that he has to really hate someone to make the Unforgivable Curses work properly, righteous indignation isn't enough.
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.
4. When Snape killed Dumbledore. In probably the most shocking twist of the series, Snape cast the unforgivable Avada Kedavra curse on Hogwarts' beloved headmaster.
Merlin's beard/Merlin's pants
Merlin's beard, Merlin's “baggy y-fronts,” Merlin's pants, or simply just his name are all common curses uttered by the wizarding community in times of surprise or crisis.
The least-used spell: Waddiwasi, used in Harry Potter and the Prisoner of Azkaban, which is “the incantation of a charm that can be used to shoot a small, soft mass of whatever the caster so desires at the target or victim,” according to the Harry Potter Wiki.
After being on the run from a bunch of Snatchers, the gang were taken to Malfoy Manor, where Bellatrix proceeded to torture Hermione using the Cruciatus Curse.
Expelliarmus did not beat Avada Kedavra.
Voldemort's wand (the elder wand) recognized its true master (that was Harry) and refused to attack it. In a way Voldemort killed himself as his own spell backfired on him.
'Is Draco alive? Is he in the castle? ' The whisper was barely audible; her lips were an inch from his ear, her head bent so low that her long hair shielded his face from the onlookers.
In the books it is revealed that Harry Potter got the scar when he was attacked by Voldemort, who had just murdered his parents. Voldemort launched the killing curse "Avada Kedavra" at baby Potter but the spell rebounded. It was the only time someone had been hit in the face by the curse and survived.
Harry also successfully used Expelliarmus when he disarmed Snape in the Shrieking Shack and when he made a giant spider release him during the third Triwizard task, but it wasn't until he turned it against Voldemort that it started to become associated with him – and that, as Lupin later implied, was where the danger ...
In dying, Lily set the path for Voldemort's downfall. Her sacrifice gave Harry the power of love, a protection spell sealed with the blood spilled by her death.
Wingardium Leviosa! Harry Potter mastered the levitation charm in his first year at Hogwarts School of Witchcraft and Wizardry.
The Disarming Charm became Harry Potter's signature spell, and it notably caused the death 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 that ...
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. In 1707, the Wizards' Council was restructured into the Ministry of Magic, which allowed for more strict restrictions on certain types of magic.
Dec. 28, 1997: Ron Weasley destroys Salazar Slytherin's locket deep in the Forest of Dean, Gloucestershire, by stabbing it with Godric Gryffindor's sword.
Avada Kedavra - Used 8 times.
Avada Kedavra is the worst of these curses, as it is used to end the life of an opponent. It is common to see this curse used by the Death Eaters and by “He Who Must Not Be Named.” This spell is based on the Aramaic, meaning "disappear like this word."