Its incantation is Avada Kedavra. The only known counter-spell is sacrificial protection, which uses the magic of love.
There is no way to block the spell, and there is no counter-curse - it can only be dodged. Harry Potter is the only known survivor of the Curse, having been protected by Lily Potter's sacrifice - the spell instead rebounded upon the caster, Lord Voldemort.
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.
Spells Harry is immune to become new unforgivables. Harry is immune to Obliviate and Avada Kedavra due to them both being magics that target the soul? Obliviate causes the sould to be 'unaligned' with the mind and that's why things aren't remembered.
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.
The Killing Curse is a spell that causes instantaneous death and is one of the three Unforgivable Curses. Its incantation is Avada Kedavra. The only known counter-spell is sacrificial protection, which uses the magic of love.
The darkest of the Dark Arts, Harry Potter unforgivable curses are the Cruciatus Curse, the Imperius Curse, and the Killing Curse. Although the curses are highly illegal, Harry using Unforgivable Curses happened, but he uses them once he was thrust into the Second Wizarding War.
Avada Kedavra is the killing curse in the Harry Potter series. It is a fictional spell and cannot be blocked in reality. In the Harry Potter series, so much magic is “unmagical” because all the characters can learn it with the right words, wand movement, and enough practice. What is easily done is also easily undone.
Phoenixes were semi-protected from the Killing Curse, due to them being immortal. In 1996, Fawkes swallowed one intended for Albus Dumbledore, causing him to burst into flame and die instantly. However, he then was reborn from his ashes. This makes phoenixes resistant to the Killing Curse.
Firestorm. Firestorm was a spell that created a large ring of fire around the caster's wand. This spell is one of the last and most powerful spells that Albus Dumbledore cast using the elder wand before his death.
Throughout the entirety of the franchise, Harry is thrown into the most heat, and his skills as a wizard are constantly tested. That being said, his go-to spell has to be Expelliarmus.
Defeating The Dark Lord with his signature spell
Disarming is about defence, not murder. Voldemort was a killer, Harry was not. It was an important distinction for Harry, who had learned so much about Voldemort and seen first-hand the ways in which they were similar.
None of the good guys dare use the Killing Curse throughout the events of the movies and books, no matter how high the stakes and how difficult things are. But Ron Weasley is the exception, giving it a go in the Deathly Hallows: Part 2 movie when himself and Hermione look destined to die via Nagini.
Avada Kedavra
Topping the list for the most powerful spells in the Harry Potter universe is no other than Avada Kedavra, Voldemort's favorite to instill his will and fear onto others. The spell itself is a play on Abra Kadabra and is easy to cast by just about anyone in the Wizarding World.
She didn't block it. She ducked, she dodged it, she moved her head or body to avoid it. No one has blocked the curse with a spell to do that.
Draco Malfoy (Cruciatus and Imperius Curses)
Although the use of these curses is rightly unforgivable, it's important to note that Draco never used them for his own benefit. It was always the pressure from Lord Voldemort that forced Draco into his crimes.
It wasn't just inanimate objects that could become Horcruxes. Lord Voldemort's beloved snake companion, Nagini, was also transformed into one, and Dumbledore seemed to know it, ominously predicting that a day would come where Voldemort would 'fear for his snake'.
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.
Yes, if the curse is powerful enough. Hagrid is half-giant, and it is said that giant-blood can “absorb” some of the power in spells. ... For instance, Voldemort's Avada Kedavra can probably kill Hagrid with ease. Yes, but it would require a stronger than average wizard casting it to have a killing effect.
Powerful creatures such as trolls, dragons, and giants may exhibit magical resistance – a certain degree of immunity against hexes and spells. Hagrid is resistant to certain spells (like the Stunning spell) due being half giant.
As the youngest Weasley, we're sure Ginny observed more than her fair share of unpleasant spells over the years but it was the Bat Bogey Hex she was famous for – and with good reason.