Avada Kedavra

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The Avada Kedavra is a powerful spell first introduced in Harry Potter and the Goblet of Fire, also known as the Killing Curse. It required advanced and powerful magic to perform this spell, but when cast properly it is capable of killing anything instantly producing a flash of bright green light and leaving no mark on the victim's body. Snape used this curse on Professor Dumbledore in Harry Potter and the Half-Blood Prince to kill him (As of Dumbledores wish).

Etymology

This spell is a corruption of "abracadabra" which was used as a healing spell to drive disease from the patent's body in the middle ages. Its likely source is either the Arabic "abra kadabra" (may the things be destroyed), or the Aramaic "abhadda kedhabhra" (disappear with these words).

Appearances

This spell was first seen in Harry Potter and the Philosopher's Stone (Movie only) but first named in Harry Potter and the Goblet of Fire where Mad-Eye Moody used this spell on a enlarged spider. It is then used through the next four books.

In Harry Potter and the Chamber of Secrets' movie, Lucius Malfoy attempted this spell on Harry Potter^[1] but failed only managing to say "Avada K-" before Dobby blasts him backwards.

References and Sources

1. ↑ 2:19:00+