A rather dangerous curse, when the incantation was uttered, its effect was the equivalent of an invisible sword; it was used to slash the victim from a distance, and resulted in deep wounds. The slash followed the user's wand movements.
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.
However, Harry did know that Sectumsempra was a killing spell. (Would probably be considered an Unforgivable Curse, if the Minister found out about it, and was not because only Snape and Harry actually knew the spell). And he still tried to hit Snape with it, knowing that he would kill him.
To his horror, it gashes Draco's face and chest, spilling his blood everywhere. Moaning Myrtle flies off, screaming. Professor Snape responds swiftly and heals Draco's wounds, subsequently hurrying him to the Hospital Wing.
Vulnera Sanentur was the song-like incantation of a healing spell and counter-curse to the Sectumsempra Spell, which was invented by Severus Snape. While sectumsempra was invented by Snape, Vulnera Sanentur is often mistaken to be invented by him as well.
Why Sectumsempra Isn't an UNFORGIVABLE Curse - Harry Potter Theory
How did Snape cure Draco?
It's implied that Septum Sempra is Snape's own creation, that he used a specific counter-curse to heal Draco, and that the spell isn't designed to be instantly fatal, but to inflict a gruesome, but relatively slow death if left untreated. It's likely Snape is the only person who knows said counter-curse.
Why didn t Harry get in trouble for using Sectumsempra?
When Harry critically injured Draco Malfoy with the Sectumsempra curse, it was actually enough to have him expelled, as Professor Minerva McGonagall stated Harry was lucky not to have been, due to Snape giving lenience to prevent others from finding out that he was the one who invented the curse.
A rather dangerous curse, when the incantation was uttered, its effect was the equivalent of an invisible sword; it was used to slash the victim from a distance, and resulted in deep wounds. The slash followed the user's wand movements.
Although healing magic could usually heal injuries without scarring, with dittany being one of the more effective, injuries caused by Dark Magic usually left scars that could not be healed, as Severus Snape expressed possibility that Draco Malfoy may have had some scars from the Sectumsempra curse, and Bill's scars ...
The professor drew his wand, and muttered an incantation that "sounded almost like a song." He performed this counter-curse three times and with that, Draco was lifted into a standing position. Snape informed him he still needed to go to the hospital, and ordered Harry to stay behind.
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 Killing Curse is a spell that causes instantaneous death and is one of the three Unforgivable Curses. Its incantation is Avada Kedavra. The only known counter-spell is sacrificial protection, which uses the magic of love.
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.
The injury was caused by Snape's Sectumsempra spell in order to stop the Death Eaters from hurting George (who he thought was Harry) and Lupin, but missed and hit George. Hermione and Kingsley then arrived, both unharmed, followed by Arthur and Fred Weasley, both concerned for George.
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.
In Harry Potter and the Deathly Hallows: Part 2 and subsequent video game adaptations, this event takes place in the Boathouse instead of the Shrieking Shack. Instead of lowering the protective orb over Snape, Voldemort instead slashed his throat, and then had Nagini attack the weakened Snape.
What is the difference between diffindo and sectumsempra? Diffindo and Sectumsempra have similar magical effects, but Sectumsempra is dark magic and therefore difficult to deflect.
Harry Potter's use on Draco Malfoy in the Duelling Club. The Tickling Charm (Rictusempra), also known as the Rictusempra Charm, is a spell that causes a victim to buckle with laughter. It also has at least two other side effects on the victim. It is usually used as a diversionary tactic in duels.
Family. Snape's family background is mostly shown in flashbacks during the course of the last three novels. Snape was born to Eileen Prince, a witch, and Tobias Snape, a Muggle, making him a half-blood (hence the name, "Half-Blood Prince").
That same year, Aragog contracted an unknown illness over the summer, and despite Hagrid's attempts to heal and comfort Aragog by feeding him giant grubs, he eventually died on 20 April 1997.
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 the intention of using it against his enemies, and it soon became one of his specialties.
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.
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 ...
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.
