Avada Kedavra is a spell that causes instantaneous death and is one of the three Unforgivable Curses. There is no known counter-curse or cure for it; however, one may dodge the green bolt, use a physical barrier to block it, or intercept the bolt with another spell. An explosion or green fire may result if the spell hits something other than a living target. Lord Voldemort was famous for using this curse regularly and indiscriminately. Its incantation is Avada Kedavra
The Avada Kedavra curse was invented during the early middle ages, by dark witches or wizards unknown. The curse was created primarily as a means of quickly and efficently slaying ones oppenent in a duel.
"The Cruciatus, Imperius and Avada Kedavra Curses were not made "unforgivable" until 1717." —Albus Dumbledore
After the Wizards' Council was reformed into the Ministry of Magic tighter restrictions were placed on the use of certain kinds of magic. The Avada Kedavra curse was deemed by the Ministry to be dark magic, and, along with the Cruciatus and Imperius curses, were declared "unforgivable" in 1717. The use of any of these three curses would result in a life sentence in Azkaban.
The Killing Curse is described as a jet of blinding green light, which causes the victim instant death. There are no secondary effects; the victim simply "drops dead" for no biological reason. It is possible that the victim's internal organs cease function, or that once the spell hits a person's body, it simply kills every living cell in the victim's body. It could also cause sudden brain death, simply stopping the progress of every electrical synapse in the brain simultaneously by draining all potential energy there. In addition to this, it is possible that it causes a person's soul to "pass on", and leave the body, similar to when the body dies naturally, and the soul passes on into whatever afterlife there may be. A death caused by this curse may be physically painless; "echoes" of previous victims have asserted the death felt "quicker and easier than falling asleep". However, upon waking from his near-death experience, Harry Potter felt the curse's aftereffects and described it in a similar manner to that of an "iron-clad punch" to the chest
Victims of the Killing Curse that have been examined with Muggle methods are known to show no visible signs of trauma. Though Muggle methods are unable to identify the means of death, Ministry of Magic specialists are familiar with the markings, or lack of them. The killing curse is known to leave no identifiable marks or any signs of the reason for death. Victims appear to "drop dead", or to appear "perfectly healthy apart from the fact they were all dead
When this curse hits an inanimate target, its effect varies: it can produce small fires, small greenish explosions, or explosions of such intensity that can blow up an entire story of a cottage. However, certain objects, such as the centaur statue of the Fountain of Magical Brethren, managed to block the curse without any visible damage to itself
Only one person is known to have survived a direct application of the curse: Harry Potter, who was saved when his mother, Lily Evans, lovingly sacrificed herself by blocking the spell with her body . Over a decade later, Harry would survive the curse another three times: once during Priori Incantatem in his battle against Lord Voldemort in the graveyard in his fourth year. Again, in 1998 when the curse killed only the Horcrux inside him, and once more when the wand being used to curse him, the Elder Wand, refused to destroy him because Harry was its true master. This also makes Harry the only person to have survived the Killing Curse multiple times. Lord Voldemort has survived the Killing Curse once when it backfired on him in 1981 (while attempting to kill Harry Potter). However, this was because he had Horcuxes at that time, and even so his body was still destroyed.
Phoenixes are also immune to the Killing Curse. In 1996, Fawkes swallowed one intended for Albus Dumbledore. He burst into flames, and was reborn from his ashes.
The Killing Curse can be survived if it is dodged or physically blocked by an object, such as the statues Dumbledore animated to protect Harry Potter during his duel with Voldemort after the Battle of the Department of Mysteries.Although considered unblockable by magic, as noted above there is a rare circumstance in which the Priori Incantatem effect can block it.
The Killing Curse is not the only spell that will cause death to a living creature. Other spells may cause injury or bleeding, such as Fiendfyre, Sectumsempra, possibly Antonion Dolohov's curse, if cast at a person, the Blasting Curse or Expulso, or an overuse of the Stunning Spell.
References have been made to aurors using deadly force against opponents, but whether this means they were authorized to use the killing curse (i.e. a "licence to kill") is unclear. Despite the circumstances, it is unknown whether the curse was used by anyone but Voldemort and his Death Eaters during the Battle of Hogwarts.
Avada Kedavra is based on the Aramaic אבדא כדברא avada kedavra, meaning "I destroy as I speak". It is notably similar to "abracadabra", which is a famous word used as an incantation by magicians, and has, in actuality, the exact same root. The word "Kedavra" is also very similar sounding to the Latin origin word "cadaver", which refers to a corpse.
• In the film adaptation of Harry Potter and the Chamber of Secrets, Lucius Malfoy says "Avada" at Harry Potter after he unwittingly frees Dobby. Dobby knocks Lucius backwards with magic to protect Harry, and he doesn't finish the incantation. The part of the incantation shown, for plot reasons, was not represented in the subtitles. However, on the DVD if the audio is set to Spanish, Lucius clearly says "Avada" to where it can be understood, in contrast to the English version, where he says it fast as if he's making a hissing sound.
• In the film adaptation of Harry Potter and the Order of the Phoenix, Bellatrix Lestrange is shown using the Killing Curse to murder Sirius Black in a scene fundamentally different from that of the novel, in which Sirius was killed by an unknown curse cast by Bellatrix. The effect of the curse is also not shown to be instantaneous in the film.
the three basic points: the Incantation, Power of Mind and Proper use of the Wand.
1) The Incantation First of all and perhaps most important: THE SPELLING of the incantation. It is NOT "Aveda kabrada", "Abba Kabreda" or, as the muggles have utterly trashed this spell: "Abracadabra". It is "Avada Kedavra" and before going on further into this article, the first task you have to do is write the incantation 1500 times in a piece of parchment, repeating it out loud so you get the hang of its pronunciation (Ah-VAH-dah Keh-DAH-vrah.) Any mispronouncing of these words can lead to hilarious yet not fatal results, which is not what we're aiming for here.
2) Power of mind Having magical abilities is not enough to be able to cast this curse. It requires, above all, Willpower, as well as Rapidness, Energy, Concentration, Knowledge and Strength (These 6 elements are most commonly known by the acronym WRECKS, not hard to recall since it is what muggles become after casting the spell on them.)
• Willpower: This means that if you're uncertain about casting the spell on someone, then, most probably, your spell won't work. You need to be sure of what you are doing. If you don't feel confident enough, there is always the Imperius Curse, and you can cast it and make someone else do the job for you (although this particular spell represents different challenges.) You can also kindly ask one of your bolder fellow Death Eaters to cast it for you.
• Rapidness: It implies that if you're not fast enough, someone else can cast the Killing Curse on you first and then you won't be the one who gets to point at them with your finger and laugh derisively.
• Energy: The killing course is a spell that consumes a lot of your magical energy. It is recommended that you save the spell for special ocasions and don't go wasting your energy by casting the spell on less important beings like stray kittens or the fleas of your dog.
• Concentration: You can have all the power of Lord Voldemort, Harry Potter and David Blaine together and yet if your mind is not focused on what you are doing, you will not be able to cast the spell. It is important to concentrate; look at the muggle in the eyes (be sure to add a smirk or a glare, whatever suits the situation) and CONCENTRATE. Think of what you really want to accomplish with this spell and hold on to that thought. Do not blink, do not hesitate, do not think of anything else until you have accomplished your task. Not until then can you proceed to think about going to the bar and brag with your fellow Death Eaters about the events of the day.
• Knowledge: Yes, you have to know the story behind spell and how it was created so you can really get into it while casting it. Once you have learned how this spell came to be, it is easier to focus and concentrate while trying to perform this curse. If you haven't read about The Killing Curse, go to your local library and look for "Dark Spells and their Origins", and read it. Now.
• Strength: Just as the spell requires a lot of magical energy, it also requires lots of physical strength. This doesn't mean you need to be brawny and bulky to cast it, but it has been known that people with delicate heart condition or other possible serious illnesses can't resist this spell too well. They usually end up following the muggle in their pathway to the ground, while still managing to point and laugh derisively, though the satisfying effect of these last two taunting methods is lost completely if the wizard dies. Thus, go to your local witch doctor and ask for an "Avada Kedavra Resistance Test". That should be able to let you know if you're fit for casting this spell. If not, well, there are still other curses you can perform that are less risky for your health, and still can inflict damage to the health of others.
3) Proper use of the wand The "Swish-and-Flick" technique is not applicable for this spell. The technique to be used here is the one denominated as "Point-Steady-or-Face-the-Consequences". The trick here is to hold the wand as steady as possible. One little shake of your wrist and the spell might hit the wrong target, since it comes out of the wand quite forcefully. There is a recorded case where a wizard hit the muggle that was selling fast food two streets away, rather than the one that was sitting in front of him.
Now, before you actually grab a wand and attempt all these useful tips, it is recommended that you practice your concentration techniques and specially to keep your hand STEADY. (Drop the excessive coffee drinking if you must.) To see how steady your hand is, we recommend the "Indicacion" spell. You can see if your hand is shaking by pointing your wand at a wall and casting the abovementioned spell. A small dot of light should appear in the wall. As an advanced excersise, paint a dot in that wall and try to keep the dot of light from your wand right on top of the dot you drew.
Practice makes perfect. We recommend that you don't venture into trying anything with a muggle before proper practice, otherwise you'll end up making a fool of yourself and the muggle will just walk away thinking that you are under the influence of a psychotropic susbtance.
Good luck!
Lord Voldemort will Provide.
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