In the Triwizard Tournament, he used Expelliarmus against Voldemort's Avada Kedavra, leading to the rare Priori Incantatem effect. The charm's non-lethal nature is also why Harry used it against Draco Malfoy in the Room of Requirement, despite the unintended consequence that followed.
One of the three Unforgivable Curses outlawed under wizarding law, Avada Kedavra kills the victim on impact, instantaneously and painlessly, usually with a blinding flash of green light. There is no way to block the spell, and there is no counter-curse - it can only be dodged.
The Killing Curse, as an "unblockable" Curse, cannot be intercepted by another spell, except in circumstances of Priori Incantatem, where the caster and his opponent's wands and spells are locked together. An explosion or green fire may result if the spell hits something other than a living target.
Overview. Avada Kedavra, also known as the Killing Curse, kills a person instantaneously and without injury. There is no counter for it, and only one person, Harry Potter, has ever survived it with Sacrificial Protection that has been endowed upon Harry Potter by His Mother Love for Him.
Avada Kedavra cannot be blocked as you correctly pointed out, except by physical objects as seen when Dumbledore duels Voldemort in the Order of The Phoenix, or due to the effects of Priori Incantatem as a result of wands with twin cores duelling as explained in Goblet of Fire.
How Expelliarmus Beat Voldemort's Avada Kedavra - Harry Potter Explained
Why was Snape's Avada Kedavra blue?
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.
Expelliarmus is very popular in dueling and is Harry Potter's trademark spell, precisely because it doesn't cause any damage to the opponent. It simply disarms them, nullifying the threat. This method isn't always practical — and when there's a war going on, something more permanent is often necessary.
Nevertheless, while the impact of Avada Kedavra was unforgettable, Crucio was far more deadly than that, and Imperio as it could make a victim beg for death solely to stop the pain.
In the final movie, Harry Potter and the Deathly Hallows pt. 2, Molly first hits Bella with a spell that freezes her, most likely Petrificus Totalus. Then, she launches another one that shatters her entire body into pieces, which could be expelliarmus, bombarda, stupefy, or any spell that can produce such an effect.
Although it is not confirmed to have been the Killing Curse, it is highly likely that Ron attempted to kill Voldemort's snake, and last Horcrux, Nagini, with Avada Kedavra. This is because, in the movies, Ron can be seen firing out a green spell at the snake, and it looks just like the Killing Curse.
The thing with Avada Kedavra is that it is essentially unblockable (ie. Protego, and other shield spells are ineffective against it.) Only dodging it, an effect like Priori Incantate, or putting something solid between you and the caster (for example: a Phoenix, a statue, or another living creature) will stop it.
The Headmaster's brilliance is practically limitless; more importantly, there are brands of magic that he would never resort to, regardless of the situation. He could have theoretically defeated Voldemort with a simple Avada Kedavra, but he chooses to err on the side of compassion, instead.
Dumbledore suppress 'Avada Kedavra' with his Elder Wand? Well he doesn't need to. Being extremely skilled in transfiguration he can transfigure something to take a hit in a fraction of a second. In Ootp he blocks Voldemort's killing curse by using a transfigured cenataur,by apparating and using his Phoenix.
The Disarming Charm became Harry Potter's signature spell, and it notably caused the final defeat of Lord Voldemort during the Battle of Hogwarts by rebounding his Killing Curse, because the Elder Wand recognised Harry as its master through the spell connection, and thus strengthened the Disarming Charm to the point ...
In the film, Bellatrix casts a blue spell at Ginny Weasley instead of a Killing Curse, who deflects it using a Shield Charm. In the book she just avoids it.
The first time you can learn Avada Kedavra is at the end of the "In the Shadow of the Relic" quest. If you said no the first time, you'll have the opportunity to learn the killing curse from Sebastian later, depending on whether you snitched on him.
It's also believed that Avada Kedavra requires the caster to be willing to commit murder for the spell to work. While it was difficult to master the Unforgivable Curses, Harry might not have had the ability or desire to use the Killing Curse since he's not a murderer.
Yes, a skilled witch or wizard can counter or block the Expelliarmus spell, using spells such as **Protego** (the Shield Charm) or by simply evading it.
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.
If the spell is strong enough then it may knock someone off their feet. I think J.K. Rowling just wanted to show how weak Lockhart really was (and possibly how powerful Snape was). edit: also Snape would have a lot of emotion behind his spell as he didn't like Lockhart.
Originally Answered: In the Goblet of Fire book, the Avada Kedavra is described as unblockable. However, in the Deathly Hallows movie, Hermione blocks an Avada Kedavra curse aimed at her.
The Avada Kedavra – the killing curse from the Harry Potter Wizarding World is unforgivable, cannot be blocked, and is colored green. Every time books or movies make mention of the spell, they insist on those things.
