Sectumsempra was a curse invented by Professor Severus Snape that lacerates the target and causes severe haemorrhaging. Snape created it as a student of Hogwarts, with the intention of using it against his enemies, likely including the Marauders, and it became one of his specialities.
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.
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.
While he himself was a student at Hogwarts, Professor Severus Snape created Sectumsempra (in Latin, sectum means "to cut" and semper means "always" or "ever"), which causes brutal lacerations on the target's body as if they've been slashed with an invisible blade.
How Expelliarmus Beat Voldemort's Avada Kedavra - Harry Potter Explained - YouTube.
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 darkest of the Dark Arts, Harry Potter unforgivable curses are the Cruciatus Curse, the Imperius Curse, and the Killing Curse. Although the curses are highly illegal, Harry using Unforgivable Curses happened, but he uses them once he was thrust into the Second Wizarding War.
Harry Potter: Why Voldemort Didn't Use Avada Kedavra On Snape - IMDb. Voldemort killed Snape in Harry Potter And The Deathly Hallows Part 2 using his Horcrux snake Nagini instead of his favorite Unforgivable Curse, Avada Kedavra.
The short answer is no. While yes Snape did gash the side of James' face, Sectumsempra is a far deadlier curse. When Harry used the hex in The Half-Blood Prince, Draco collapsed onto the floor, and severely bleed through his face and chest.
But what is the absolute worst of them? Some would say there's no spell worse than Avada Kedavra, the Killing Curse that Voldemort used so indiscriminately.
Harry yells “Sectumsempra,” the hex scribbled in the margins of the Half-Blood Prince's book. Blood spurts from Draco's face and chest, and Myrtle beings screaming. Snape bursts into the room and heals Draco's wounds almost immediately. Snape hurries Draco to the hospital wing, commanding Harry to wait behind.
When the time comes, and Snape is facing Dumbledore with his wand out at the top of the Astronomy tower- he finally releases the spell that ends Dumbledore. We can very clearly see that Snape used the most effective method of killing known to the Harry Potter story- avada kedavra, the killing curse.
Harry used Expelliarmus , a disarming spell, on Voldemort in the final battle because Harry was never going to cast a killing curse on someone, even Voldemort.
It's unknown quite how they managed this, although we do know that certain spells do levitate things, such as the Levitation Charm, or Snape's self-penned spell, Levicorpus.
Firestorm. Firestorm was a spell that created a large ring of fire around the caster's wand. This spell is one of the last and most powerful spells that Albus Dumbledore cast using the elder wand before his death.
Its incantation is Avada Kedavra. The only known counter-spell is sacrificial protection, which uses the magic of love. However, one may dodge the green bolt or block it with a physical barrier.
The most likely reason why Lord Voldemort's nose disappeared and he devolved into such an evil-looking creature is that as he dabbled deeper into the Dark Arts, his appearance gradually became as distorted as what remained of his twisted soul.
Quirrell didn't use the Killing Curse on Harry, because Voldemort said “use the boy” to get the Sorcerer's stone from the Mirror of Erised.
Draco Malfoy (Cruciatus and Imperius Curses)
Although the use of these curses is rightly unforgivable, it's important to note that Draco never used them for his own benefit. It was always the pressure from Lord Voldemort that forced Draco into his crimes.
She stared Bellatrix down and challenged her to a one-on-one duel. Molly Weasley had hit Bellatrix Lestrange straight in the heart with an unspecified spell and killed her on the spot. Since Avada Kedavra is an unforgivable curse, many fans have argued that it is not what Molly used.
In Deathly Hallows, Hermione faced a real test of her physical and psychological stamina. 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.
He took particular pleasure in taunting Hermione Granger, who just happened to have Muggle parents. Malfoy called her 'Mudblood', a very grave insult referring to a wizard or witch born to non-magic parents.
Therefore, figuring out a spell that is Draco's favorite is hard and, in the movies, there is no defining moment that cements a spell as his favorite. Based on Harry Potter lore, and an article by The Healthy Journal, Draco's signature spell is a N.E.W.T standard spell, The Protean Charm.