In the books it is revealed that Harry Potter got the scar when he was attacked by Voldemort, who had just murdered his parents. Voldemort launched the killing curse "Avada Kedavra" at baby Potter but the spell rebounded. It was the only time someone had been hit in the face by the curse and survived.
Scar. A scar on Harry Potter's forehead in the shape of a lightning bolt is the result of a failed murder attempt by Lord Voldemort on October 31, 1981, when he struck 15-month-old Harry with the Killing Curse.
So why does Harry always use Expelliarmus? Well that would be just his natural reaction. From the wiki page harrypotter.wikia.com/wiki/Harry_Potter it says that Expelliarmus is his signature spell and would thus be his natural response to any attacks. Just like if person A trained the hammer fist a lot.
One theorist on a Barnes & Noble message board notes that Harry's scar is the mirror image of a rune called “Eihwaz,” which symbolizes the yew tree, the same wood as Voldemort's wand.
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.
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.
Though Harry encountered many opportunities that deemed Avada Kedavra necessary, it remains as one of the Unforgivable Curses Harry Potter never cast. For one, he viewed the spell as an immoral practice commonly used by users of the Dark Arts.
Those that are gifted with the power of flight are perhaps more rare than any other wizard that has any other power.
Expelliarmus did not beat Avada Kedavra. Voldemort's wand (the elder wand) recognized its true master (that was Harry) and refused to attack it. In a way Voldemort killed himself as his own spell backfired on him.
Yes, he loses his ability to speak Parseltongue. In fact he lost the ability the moment Voldemort destroyed his part of his soul which lived as a horcrux in Harry. JK said that losing the ability to speak Parseltongue was actually something that gave Harry relief.
Alohomora, which is a spell that unlocks objects (and it's also Hermine Granger's signature spell).
The three Unforgivable Curses in Harry Potter are Crucio, Imperio, and Avada Kedavra, and all three are available to Hogwarts Legacy players.
Cruciatus Curse ('Crucio')
Harry tried to use this spell himself. The first time was against Bellatrix after she had killed Sirius. His attempt was unsuccessful because, as Bellatrix mockingly explained: 'You need to really want to cause pain – to enjoy it – righteous anger won't hurt me for long…'
Harry's Protection Against Lord Voldemort
When Lily sacrificed herself to save Harry in Godric's Hollow, he was protected by magic's strongest defense: love. Dumbledore explained to Harry at a young age how Lily's love lived on and served as a protection against the Harry Potter killing curse.
Although Harry was justifiably defending himself against Malfoy, who was about to cast the Cruciatus Curse, using an unknown spell was dangerous and reckless. However, despite this grievous action that could have permanently expelled him from Hogwarts, Snape only assigns Harry detention.
Harry became so enamoured with the spell that he eventually used it to finish off Lord Voldemort. Here's how Harry's relationship with Expelliarmus became his signature – and why that's a good and bad thing.
When Harry wrestles Draco's “everyday” wand out of his hand at the Malfoy's mansion, he conquers Draco, and therefore the Elder Wand — hidden in Dumbledore's tomb at the time — transfers its allegiance to Harry. Rowling said her American editor suggested the moment when Harry conquers Draco should be more dramatic.
In order to conjure the avada kedavra curse, you have to want to kill your victim. We all know that Voldemort could easily kill a child without an ounce of remorse... but not Snape. Snape didn't want to kill Dumbledore, and this was why the spell was blue instead of the usual green.
The Nundu is a huge magical animal from East Africa that looks similar to a leopard. Despite its "gigantic" size, it travels silently, and some people believed it to be the most dangerous animal alive. The toxic and disease-filled breath of the Nundu is so potent that it can obliterate entire villages of people.
Albus Percival Wulfric Brian Dumbledore was the only wizard Voldemort ever feared and the only one who could have defeated him in a duel. Albus Dumbledore is the most powerful wizard in the Harry Potter.
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.
I've always suspected Molly's lethal spell was a particularly well-placed and powerful stunner that stops Bellatrix's heart, which is consistent with the description of her death: Molly's curse soared beneath Bellatrix's outstretched arm and hit her squarely in the chest, directly over her heart.
But when Ron and Hermione are about to die by Nagini, Ron casts the killing curse as a last resort and it simply rebounds off Nagini as it was nothing.