Hey everyone, welcome to another instalment of Harry Potter Theory. Today, we'll be discussing one of the three Unforgivable Curses - Avada Kedavra - and why it's considered a worse form of killing than any other spell within the wizarding world.

Avada Kedavra - otherwise known as the Killing Curse - alongside the Cruciatus and Imperius Curse, was first classified as an Unforgivable Curse in 1717. And while it's quite obvious why it was banned from use, many have wondered why ONLY these three curses were labelled as Unforgivable. This question has been posed specifically in reference to Avada Kedavra, as it's clearly not the only spell that has the ability to kill someone.

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