𝗼𝗻𝗲 of the three unforgivable curses:
'ᴛʜᴇ ɪᴍᴘᴇʀɪᴜꜱ ᴄᴜʀꜱᴇ'
allowing the caster to control another's actions
𝗠𝘆𝗿𝗮 𝗙𝗮𝘆𝗲 𝗕𝗹𝗮𝗰𝗸, the forgotten Daughter of Regulus Black, known to be cold and ruthless.
𝗧𝗵𝗲𝗼𝗱𝗼𝗿𝗲 𝗡𝗼𝘁�...
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The 'Imperius Curse' was deemed to be dark magic by the Ministry, and, was along with the Cruciatus and Killing Curse declared "unforgivable" in 1717.
The Imperius Curse was invented during the early middle ages by dark witches and wizards and was created for the coercion and brainwashing of others into slavery.
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.
In order to resist the Imperius Curse, a person needs exceptional strength of will. This makes it unique among the unforgivable curses, as it is the only one of them with a known, reliable (depending on the victims will) method of resistance.
Unlike the other Unforgivable Curses, being subjected to the Imperius Curse - when adequately cast - is not an unpleasant experience, in fact, quite the opposite; the victims of an Imperius Curse are placed in a calm, trance-like state in which all feeling of responsibility and anxiety is banished.
If the Imperius Curse is performed poorly, the victim would have their mind addled. This is likely due to the fact that powerful, dark magic may leave irreversible biological damage. It is also possible for someone who has been Imperiused to place others under the curse as well.
An adequately Imperiused being is placed under the caster's total control and may be directed to do anything the caster wishes, including crimes such as murder, political corruption, embezzlement, and so on. Also, whilst under the caster's control, the curse may also endow the victim with whatever skills that are required in order to complete the task at hand, such as increased strength or allowing them to cast spells far above their level.
Resisting the Imperius Curse is similar to Occlumency, which requires a great amount of willpower, though it is unknown if Occlumency would actually work against the curse.
When a correctly cast Imperius curse is terminated - for whatever reason - the victims become themselves again, Also, any pain that the curse has negated by the pleasant sensation would return, along with any other pain that the victim suffered for the duration of the curse.
