Draco Malfoy's mother Narcissa was cold, cunning and devoted to the Dark Lord. But she was also a mother, which meant she was willing to risk everything to make sure her son was safe. When Harry survived Voldemort's Killing Curse for the second time, Narcissa pretended he was dead so she could get to Draco.
When Voldemort asked her to check if Harry was dead and she realised he was, in fact, still breathing, Narcissa seized her opportunity. Harry revealed that Draco was still very much alive, and she lied to her master in order to get closer to him.
She asked him because if Draco was still alive, she had something to fight for. She had a reason to lie to Voldemort. If Draco is alive, she needs to get into the school to see him and protect him, and helping Harry feign death was the easiest way to do that. But if Draco was already dead, she wouldn't have bothered.
The first time, it was his own mother dying for his sake, which created the magical protection that saved him. The second time, it was Narcissa's love of her own son which motivated her to lie to Voldemort, ensuring Harry's survival.
In a whisper, she asked if Draco was alive. When Harry replied quietly that he was, Narcissa betrayed the Dark Lord and asserted that Harry was dead. She knew the only way her family would be reunited was as part of Voldemort's conquering army, thus proving she loved her family more than she supported Voldemort.
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.
Voldemort intentionally made six Horcruxes, but when he used Avada Kedavra on Harry, he unintentionally created a seventh Horcrux. Instead of dying, Lily's love for Harry created a counter 'curse' known as Sacrificial Protection and saved Harry.
Narcissa Malfoy's Very Dangerous Lie
But she was also a mother, which meant she was willing to risk everything to make sure her son was safe. When Harry survived Voldemort's Killing Curse for the second time, Narcissa pretended he was dead so she could get to Draco.
In fact, Lucius' own support to Voldemort is revealed to come only under some form of duress, which is likely Narcissa's Veela Allure. When Lucius turns on Voldemort due to the reveal of his Horcruxes, Narcissa divorces him, taking 75% of Malfoy's wealth with her.
She asked him because if Draco was still alive, she had something to fight for. She had a reason to lie to Voldemort. If Draco is alive, she needs to get into the school to see him and protect him, and helping Harry feign death was the easiest way to do that.
In the end, the man of wealth and status was left with neither. Ultimately, his need to survive and protect his family would lead Lucius to betray Voldemort.
Lucius Malfoy's failure at the Department of Mysteries combined with accidentally destroying part of Voldemort's soul with the diary of Tom Riddle resulted in his loss of any standing with the Dark Lord. Some believed that he was safer in Azkaban than being free.
Following his failure to obtain an important prophecy at the end of Order of the Phoenix, Lucius is sent to Azkaban for a while until Voldemort breaks him out, although he doesn't play much of a role in the series going forward.
Snape saved Draco, and having realised that Harry got a hold of the old textbook, he punished Harry with a multitude of detentions for nearly killing Malfoy. Harry, despite disliking Malfoy, did not truly want to harm Malfoy to such an extent, and was both horrified and guilt-ridden by using the curse against him.
Even while he was with Ginny, Harry was always in love with Draco.” To which Tom said, “I think it was clearly a fact. Harry was constantly crushing on Draco. He just couldn't hide it.” Grint added, “I think he made quite an impression on Ron, as well”.
Specifically, Draco was jealous of Harry. It was easy to miss because Draco didn't often show his emotions, modelling himself on his cold, confident, calculating father, but J.K. Rowling has confirmed that a lot of his enmity towards Harry stemmed from envy.
Draco Lucius Malfoy (b. 5 June, 1980) was an English pure-blood wizard of French and Veela ancestry; the son of Lucius and Narcissa Malfoy (née Black), he is the grandson of Abraxas and Yelena Malfoy (née Greengrass) as well as the step grandson of Viper Malfoy (née Prince).
Lucius eventually became a Death Eater, one of the followers of Lord Voldemort, and even one of the most trusted servants, but abandoned that side after the Dark Lord's first fall in 1981. Lucius claimed he had been bewitched by Voldemort through the Imperius Curse and had not meant to serve him.
She later married Lucius Malfoy, the heir of a wealthy pure-blood family, and they had one son, Draco Malfoy.
Yep, that happened: Bellatrix and Voldemort had sex sometime around Order of the Phoenix or Half-Blood Prince, and their wild night in bed led to a child named Delphi Diggory/Riddle/Lestrange. According to Delphi herself, she was born sometime before the Battle of Hogwarts.
Narcissa, on the order of Voldemort, went near Harry, and touched his chest. She understood, in an instant, that Harry was alive, because the heart of Harry was beating frantically, and she felt it.
They decided that they had had enough of Voldemort and his plan. It was a very bold move, because if Voldemort had not perished, they'd have probably been hunted down and punished for their treason.
Phineas Nigellus's portrait inside it overheard Hermione and reported that to Snape. Snape thus knows that Harry and Hermione are in the Forest of Dean, though not exactly where; the Forest of Dean is a largish place, several wooded sections totaling about 40 square miles.
Avada Kedavra - Used 8 times.
It is common to see this curse used by the Death Eaters and by “He Who Must Not Be Named.” This spell is based on the Aramaic, meaning "disappear like this word."
Avada Kedavra, also known as the Killing Curse, kills a person instantaneously and without injury. There is no countercurse for it, and only one person, Harry Potter, has ever survived it.