When Harry unintentionally injured Draco with the Sectumsempra curse, Professor Snape gave him detention for every Saturday morning until the end of term.
No, nothing truly bad would happen to Harry externally. Internally is a different matter, Hermione didn't like Harry hurting Draco, she' hate him killing Draco, and there's no way Ron would be happy about it, although he'd try to support Harry. Dumbledore would be extremely upset about this whole deal as well.
When Draco attempted to utilise the Cruciatus Curse, Harry retaliated with Sectumsempra, a spell he remembered having read about in the Half-Blood Prince's copy of Advanced Potion-Making, which caused deep slashes across Draco, heavily wounding him and causing him to fall to the waterlogged floor, his blood floating ...
Lucius and Draco's crimes were forgiven due to their abandonment of Voldemort and his cause, and Narcissa's lie to the Dark Lord that saved Harry Potter's life in the Forbidden Forest in the Battle of Hogwarts.
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.
You will be sent to Azkaban if you use Avada Kedavra on students - Hogwarts Legacy
Did Draco heal from Sectumsempra?
Severus Snape used this spell to save Draco Malfoy after he was attacked by Harry Potter using Sectumsempra. He then took him to the Hospital Wing for further treatment, hoping to avoid scarring.
What is Harry's punishment for using Sectumsempra?
For using Dark Magic, albeit unknowingly, to cause serious harm, Snape sentences Harry to detention every Saturday until school ends. Snape dismisses Harry's protests, as does Professor McGonagall, who later informs Harry that he was lucky not to be expelled.
Tom Felton Says Harry Potter Was Constantly Crushing On Draco Malfoy - IMDb. Harry Potter had a few love interests during his time at Hogwarts. Though he eventually settled down with Ginny Weasley, he also had a thing for Cho Chang in his earlier school years. Then, of course, there's his secret love for Draco Malfoy…
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.
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. In Harry Potter and the Deathly Hallows: Part 2, Voldemort may have used this spell to slit Snape's throat before having Nagini finish him off.
Due to the harrowing experiences he had during his time with the Death Eaters and his remorse over his criminal acts as a Death Eater, Draco had realised the error in his ways and thus abandoned the old pure-blood beliefs he was raised to adopt and believe in.
Harry and Draco were pretty much neck-and-neck when it comes to dueling and wand-related stuff. It was only until Harry got a hold of Snape's diary and channeled his Slytherin tendencies that he was able to win against Malfoy. As a result, he nearly killed Malfoy in The Half-Blood Prince.
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. Harry is an incredibly talented wizard – something which Draco greatly admired.
George Weasley and Remus Lupin arrived next, and Molly attempted to heal George's wound; he recovered, but his left ear could not be healed because the wound was caused by Dark magic.
While Severus Snape was trying to cut the hand of a fellow Death Eater, he accidentally used a Sectumsempra Curse to slice George Weasley's ear. This dark magic spell, which Snape created during his student years at Hogwarts, is a curse that slashes through the skin like a sword and causes great bleeding.
Draco fell on the waterlogged floor when Harry wildly flicked his wand at him, yelling, "SECTUMSEMPRA!" His face and chest bled profusely, and it looked like he had been slain with an invisible sword. His chest was soaked in blood and Harry was horrified at what he had done.
He fell in love with Astoria Malfoy, who didn't meet his family's pure-blood expectations, and was even willing to let the Malfoy bloodline end to protect her. This shift in Draco's beliefs shows his growth and development as a character throughout the series.
J.K. Rowling said that Draco had a crush on Hermione Granger, but he doesn't show that, beacuse Hermione was a Gryffindor, Harry's friend, and also a muggle-born. After the Battle for Hogwarts, Draco fell in love with Astoria Greengrass, and they had son Scorpius.
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 fact that Draco was sobbing at the sink is also a surprising twist, as it portrays Draco as oddly sympathetic. Clearly, the stress of his predicament is taking its toll, and whatever Draco is up to, he is doing it under the threat of his own death.
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.
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.
In order to truly prove himself, Draco must kill Albus Dumbledore and pave the way for the Death Eaters to enter Hogwarts. Snape promises to protect Draco and spare him from a task that would almost certainly scar him for life, and they seal the promise with an Unbreakable Vow.
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").
