The Imperius Curse (Imperio) was one of three curses, along with the Killing and Cruciatus Curses, that were made illegal in 1717 and thereafter deemed "Unforgivable Curses". It can be used to force complete and total control of the victim with little or no resistance on the part of the victim, although it can be resisted by those with strong wills and minds.
- Harry Potter and the Goblet of Fire
- Harry Potter and the Order of the Phoenix
- Harry Potter and the Half-Blood Prince
- Harry Potter and the Deathly Hallows
- The Tales of Beedle the Bard