Sectumsempra is a very dark curse that reasons a cut ("sectum" = "cut") which will certainly not heal ever ("sempra" = "forever").

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Harry provided a dark curse on Malfoy (in the 6th movie). When Snape to be able to deal with it, bother did usage a deadly dark curse. Why wasn"t bother punished for that?


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ETA 4.17.14: We"ve spent so lot time going earlier and soon on what constitutes an acceptable answer, and which citations room acceptable, I"m afraid ns overlooked an integral part of your question. You write, Harry provided a dark curse top top Malfoy (in the sixth movie). ns missed that you to be asking about the movie variation of Sectumsempra, no the publication version. In the movie version, the publication version is fully removed; we do not watch Harry receive any kind of punishment because that hurting Draco, as you note, nor does Dumbledore carry it up or lecture Harry about it.

The scene was adjusted quite drastically. Per TV Tropes, the film machines use the consequences of Sectumsempra to alter Harry"s motivation for hiding the Half-Blood Prince"s publication in the Room that Requirement. In the book, bother hides the book for the selfish an inspiration of no wanting Snape come confiscate it. In the book, Harry yes, really shows little feelings toward Malfoy and his friends reinforce this through stating it seemed as if Malfoy was going to actors the Cruciatus Curse, which justification Harry"s actions. In the movie, Harry"s an inspiration for hiding the publication is far an ext contrite -- that hides the publication so that can"t "be tempted" (Ginny"s words) to use Sectumsempra again, or explore any other dark spells that could be in the Half-Blood Prince"s copy the Advanced Potions Making.

Even despite you significant the over answer together correct, I an alert that Harry"s specific punishment for spreading Sectumsempra against Draco is not comprehensive as it appears in canon. As you might know, I think a straight canon quote is a more sound and also reliable citation than a attach to, and also a C&P from, the Wikia. Of course, you room absolutely complimentary to disagree v me. :) Anyhow, onward! Harry and Sectumsempra:

Yes, Harry to be punished because that Sectumsempra. The 1996-1997 timeline at the harry Potter Lexicon place the Sectumsempra incident "circa May", however does no specify an exact date in might of 1997. Concerning punishment, he got detention through Professor Snape every Saturday, starting from the time of the incident with Draco until the finish of term. (I apples in breakthrough for the number of quotes from Half-Blood Prince, however they space all relevant and specific to the question, as well as the critical one, i beg your pardon is a quick and also (I think) funny read.

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‘Do you know what i think, Potter?’ claimed Snape, really quietly. ‘I think the you room a liar and a cheat and also that you worthy detention v me every Saturday till the finish of term. What do you think, Potter?’ ‘I – ns don’t agree, sir,’ stated Harry, tho refusing come look right into Snape’s eyes. ‘Well, we shall see how you feel after your detentions,’ stated Snape. ‘Ten o’clock Saturday morning, Potter. My office.’ ‘But, sir ...’ said Harry, looking increase desperately. ‘Quidditch ... The last complement of the –’ ‘Ten o’clock,’ whispered Snape, with a laugh that confirmed his yellow teeth. ‘Poor Gryffindor ... Fourth place this year, I are afraid ...’ Half-Blood Prince - page 494 - Bloomsbury - thing twenty-four, Sectumsempra

Harry misses the last Gryffindor Quidditch enhance of the season, versus Ravenclaw, wherein Gryffindor wins the Quidditch Cup, since he had to perform detention with Snape, where Snape renders Harry copy by hand Filch"s old documents of prior wrongdoers and the punishments lock received; specifically, Snape had actually Harry re-do the penalty cards for his father, James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew:

‘I assumed you could start,’ stated Snape, a malicious smile on his lips, ‘with crate one thousand and also twelve to one thousand and fifty-six. Friend will discover some familiar names in there, gvwhich should include interest come the task. Here, you see ...’ that pulled out a card from among the topmost boxes through a flourish and also read, ‘“James Potter and also Sirius Black. Apprehended utilizing an illegal hex upon Bertram Aubrey. Aubrey’s head twice normal size. Dual detention.”’ Snape sneered. ‘It must be together a comfort to think that, though they room gone, a record of their an excellent achievements continues to be ...’ <...> the was, together Harry had actually anticipated, useless, boring work, punctuated (as Snape had clearly planned) with the constant jolt in the stomach that supposed he had just read his father or Sirius’s names, commonly coupled with each other in various petty misdeeds, periodically accompanied by those that Remus Lupin and also Peter Pettigrew. Half-Blood Prince - pages 497-498 - Bloomsbury - chapter twenty-four, Sectumsempra

Note the Professor McGonagall was so upset at what bother did come Draco the she kept Harry was happy to have not to be expelled native Hogwarts:

Harry had currently been dubbed out the the typical room come endure fifteen extremely unpleasant minutes in the firm of Professor McGonagall, who had actually told the he was lucky not to have actually been expelled and that she supported whole-heartedly Snape’s penalty of detention every Saturday until the end of term. Half-Blood Prince -- page 495 - Bloomsbury - chapter twenty-four, Sectumsempra

Frankly, I was surprised that Harry received just detention after hitting Draco with Sectumsempra -- Malfoy can have bled to fatality or had actually permanent scarring on his face and also chest.

‘SECTUMSEMPRA!’ bellowed Harry native the floor, waving his wand wildly. Blood spurted from Malfoy’s face and chest as though he had been slashed with an invisible sword. The staggered backwards and also collapsed on to the waterlogged floor v a good splash, his wand falling native his limp ideal hand. ‘No –’ gasped Harry. Slipping and also staggering, Harry got to his feet and plunged towards Malfoy, whose challenge was now shining scarlet, his white hands scrabbling in ~ his blood-soaked chest. Half-Blood Prince -- page 489 - Bloomsbury - chapter twenty-four, Sectumsempra

The Sectumsempra chapter is necessary for three additional reasons:

After Harry leaves detention and returns come Gryffindor Tower, that learns the Gryffindor has actually won the 1997 Quidditch Cup. That swoops Ginny up into a huge ol" kiss, thus creating the Harry/Ginny ship as canon.The Sectumsempra incident might be the just time in the entire series where Pansy Parkinson could have in reality been justification in harping on bother -- Sectumsempra is a dark and dangerous assignment -- could it be fatal? i think the possibly might be if the person struck were then left alone v their injuries -- they might potentially bleed to death.It is in the Sectumsempra chapter that Harry lend Ron"s copy the Advanced Potions Making come switch the end for the Half-Blood Prince"s copy, therefore Snape won"t uncover out Harry has actually it. Ron has actually written his name on the within cover with one of Fred and also George"s Spell-Checking quills ... And also apparently didn"t check the results:

‘This is the copy of progressed Potion-Making that you purchased indigenous Flourish and also Blotts?’ ‘Yes,’ said Harry firmly. ‘Then why,’ inquiry Snape, ‘does it have actually the name “Roonil Wazlib” created inside the former cover?’ Harry’s heart missed a beat. ‘That’s mine nickname,’ that said. ‘Your nickname,’ repeated Snape. ‘Yeah ... It is what mine friends contact me,’ stated Harry. ‘I know what a nickname is,’ said Snape. Half-Blood Prince - pages 493-494 - Bloomsbury - thing twenty-four, Sectumsempra