Many Secret Keepers in the past have been subjected to the Imperius and Cruciatus Curses in an attempt to learn the secrets they keep, but to no avail as the Keeper must reveal it willingly. The use of any of these three curses on a fellow human being would result in a life sentence in Azkaban, unless there was sufficient evidence that the caster did so under the influence of another's Imperius Curse this was known to be a loophole that many Dark Wizards and Witches abused and lied about while they were facing trial, awaiting their sentence to prison time, particularly after the First Wizarding War. The Imperius Curse was deemed by the Ministry to be dark magic, and, along with the Cruciatus and Killing curses, were declared ' unforgivable' in 1717. The curse was presumably created for the coercion and brainwashing of others into slavery.ĭeath Eaters face the Council of Magical Law for their use of the Unforgivable CursesĪfter the Wizards' Council was reformed into the Ministry of Magic, tighter restrictions were placed on the use of certain kinds of magic. The Imperius Curse was invented during the early Middle Ages by dark witches or wizards. ' The Cruciatus, Imperius, and Avada Kedavra Curses were not made unforgivable until 1717.' - Albus Dumbledore

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