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92

Not many people knew Sectumsempra - they'd need to know it exists to ban it. Severus Snape invented Sectumsempra while at Hogwarts, and wrote it down in his Potions book. He doesn't seem to have told many people about it, it's possible he didn't tell anyone at all. “Harry was about to put his book away again when he noticed the corner of a page folded ...


90

It isn't Unforgivable in the way that the Unforgivables are A popular fan theory is that there is no grey area with Unforgivable curses. They do what they say on the tin and nothing else. Killing curse kills, imperio controls, crucio tortures. The caster also has to fully understand and mean to cause the effect the curse entails too. There's no excuse for ...


70

In what is presumably Moody's first one on one conversation with Neville, after he teaches the class about Unforgivable Curses and Neville is visibly upset at the demonstration of the Cruciatus Curse. Neville is that upset because it's the curse that Death Eaters (Bellatrix, Barty Crouch Jr., and Rabastan and Rodolphus Lestrange) used to torture his parents ...


58

It's not related to skill, it's related to emotions and power. When Harry tortures Bellatrix in book 5, she tells him "you need to mean it" for it to work. So the wizard would have to be powerful enough, and actually want to go through with it. Hatred rose in Harry such as he had never known before; he flung himself out from behind the fountain and ...


49

Barty Crouch Jr, who has a lot of experience in both ends of the Imperius curse, tells us that its victims can be aware of their situation, although normally they are not: ‘But your father escaped,’ said Dumbledore. ‘Yes. After a while he began to fight the Imperius curse just as I had done. There were periods where he knew what was happening. My ...


45

The Unforgiveable Curses are the curses for which there is no legitimate use at all. A memory charm could have, and does have, legitimate, honourable uses - modifying the memory of a muggle who's seen magic, or helping a person to overcome severe trauma, for example. Like almost anything, there's the potential there for abuse, absolutely there is, but unlike ...


45

The Ministry had to sort out which people who worked with Death Eaters were Imperiused. Arthur Weasley, as an employee of the Ministry of Magic, would have been working there when the Ministry was helping determine after the first war which people engaged in Death Eater activities were under the Imperius Curse and which were doing it willingly. “Years ...


42

Don't disagree with the accepted answer, but it leaves out why Neville was so upset by the Cruciatus curse demonstration to be begin with. Neville's parents were tortured into insanity by Voldemort's agents using the Cruciatus curse, so it's natural that Neville would be quite disturbed by the demonstration.


37

It's unclear how much skill it would take to cast an Unforgivable Curse. Mad-Eye Moody (actually Barty Crouch Jr. using Polyjuice Potion) says that the students in his class could all attempt the Killing Curse on him and he'd remain unharmed. “Avada Kedavra’s a curse that needs a powerful bit of magic behind it – you could all get your wands out now and ...


36

Moody was kept in a trunk so it might not matter if he had fought it. It seems like Moody was placed under the Imperius Curse after he was already captured using other methods. “We journeyed to his house. Moody put up a struggle. There was a commotion. We managed to subdue him just in time. Forced him into a compartment of his own magical trunk.” - Harry ...


35

Avada Kedavra seems to only work on one target per spell. It seems like once Avada Kedavra hits one living target, it’s “used up”. Fawkes was able to take a Killing Curse for Dumbledore. Once it hit him, it couldn’t hit Dumbledore. “But even as he shouted, another jet of green light flew at Dumbledore from Voldemort’s wand and the snake struck – ...


34

Some of the reasons could be: Moody was a very powerful auror and it would have been very difficult to keep him in control for that long. Barty Crouch Jr. was able to overpower him by taking him by surprise, and having help from Wormtail. Even then, he only just managed to do it. Wormtail and I did it. We had prepared the Polyjuice Potion beforehand. ...


33

Well, the Avada Kedavra, Imperius, and Cruciatus Curses were made illegal by the Ministry of Magic in 1717 and classified as Unforgivables at that time via legislation, "with the strictest penalties attached to their use." (Tales of Beedle the Bard - Page 142 - Collector Edition). So, technically, it's due to legislation. However, legislation is always ...


33

Yes - but awareness seems a sign of resisting the Imperius Curse. From the evidence we have, it seems like someone under the Imperius Curse who isn’t able to resist is largely unaware of their actions. In all the situations we see someone described as becoming aware of their actions under the Imperius Curse, they’re beginning to resist it. Both Barty ...


32

If you're a Star Wars aficionado, think about Confundus as a light Force suggestion (sometimes used by Luke in the EU, at the level - or even less so - of Ben Kenobi's "These are not the droids you are looking for"). While it can theoretically be used to influence other person's actions, it's an indirect influence: you let them believe something they ...


31

There is no canon explanation, I guess, but here some possible reasons: The Taboo spell sounds like something very complicated. It detects as someone speaks out a certain name without regard of any protective spells cast. Remember how Ron, Hermione, and Harry were caught by the snatchers despite the protection they had. Voldemort is an immensely powerful ...


23

Yes he most likely did, but he denied it to save himself from Azkaban. The Death Eaters that tortured the Longbottoms were Bellatrix, Rabastan and Rodolphus Lestrange, and Barty Crouch Jr. However, except for Bellatrix, most of them deny their involvement. It certainly seems, though, like the four Death Eaters were all caught in the act of torturing the ...


21

First of all, the Death Eaters had implicit orders that Harry was Voldemort's to kill; they had been specifically ordered not to kill Harry. This is incredibly nitpicky, but it says that the two killing curses missed Harry's head and they clearly did not hit Hagrid. Harry sent stunning spells, but it does not implicitly say he sent stunning spells to block ...


21

The Confundus Charm is used to confound or confuse. The Imperius Curse is used to control another mind. The difference is similar to forgetting why you went into a room with a knife versus going into a room and stabbing someone. Under the influence of the Confudus Charm, it could be suggested to you that you were going to stab someone, but if that doesn't ...


19

The Imperius curse, like all magic in Harry Potter, isn’t foolproof. As Crouch (impersonating Moody) himself explains it in class: ‘The Imperius curse can be fought, and I’ll be teaching you how, but it takes real strength of character, and not everyone’s got it. (…)’ (Goblet of Fire, chapter The Unforgivable Curses) It is difficult to place a ...


18

Quite possibly. I don't think we can say definitively. But Dumbledore's character and beliefs can give us a good idea. Let's take the curses one at a time. The Imperius Curse I highly doubt that Dumbledore ever performed this. It seems to me to be an anathema to everything he stands for. Dumbledore, after all, was a profound believer in the importance of ...


17

Imperio is used to control someone's actions, it mightn't make them give you information. All of the times we've seen the Imperius Curse used, it was to make someone do something. The actions may have required them to say certain things while carrying out the tasks they were Imperiused to perform, but Imperio has never been used to simply get information ...


16

Barty Crouch Jr. has more control being Moody than Imperiusing the real one. First of all, and perhaps most importantly, Barty Crouch Jr. would be able to strategically plan his actions much better when doing them himself than having to puppet Moody through them. There's a definite benefit in being able to take over the role of Moody, and do everything ...


16

No, Imperio doesn’t seem to have any emotional requirements. Harry casts Imperio twice in Gringotts, without particularly strong emotions against the victims. It’s also important to remember, these are his first and second times ever casting the Imperius Curse, so he had no practice or experience casting it. He’s fairly successful, despite that. “Act now,...


16

Using three spiders makes clear each is the effect of one spell. While he could have used the same spider for all the Unforgivable Curses, using three different spiders is a good way to make it clear to the students that the effects caused are solely the result of the spell just cast on it, not a cumulative effect of multiple spells. We know that casting ...


15

There are five reasons: Ethical. Both Harry and Dumbledore feel that using Unforgivable curses isn't exactly a Good Thing to do (Harry ends up using them when absolutely required in DH, however). Harry is well known for relying on Expelliarmus (See the Seven Potters battle in DH as well as him using the same on Voldemort in the end) Dumbledore is ...


15

There's definitely some distinction between animals and humans as Barty Crouch Jr (as Alastor Moody) demonstrated the Unforgivable Curses on spiders with no repercussions. Given you specifically mention house elves, I'm guessing you're more interested in non-human sentient life, in which case Crouch also says "The use of any one of them on a fellow human ...


13

Since only Snape and Harry ever cast it, the Ministry doesn't really need to be concerned Severus Snape invented Sectumsempra. When Harry tried to cast it on Snape, he said: "You dare use my own spells against me, Potter? It was I who invented them ~ I, the Half-Blood Prince!" —Harry Potter and the Half Blood Prince Let's assume that Snape is ...


13

It seems likely that the same requirement exists for the Imperius Curse that exists for the Cruciatus Curse. When Harry uses the Imperius Curse for the first time in Gringotts, we see the following: Deathly Hallows Chapter 26 “We’re in trouble; they suspect,” said Harry as the door slammed behind them and he pulled off the Invisibility Cloak. ...


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