The Cruciatus Curse
The Cruciatus Curse is one of the Unforgiveable Curses, this spell causes the victim to suffer almost intolerable pain. Some victims of prolonged use of this curse have been driven insane.
Known victims of the Cruciatus Curse
Aberforth Dumbledore - (curse performed by Gellert Grindelwald)
Frank and Alice Longbottom - (curse performed by Bellatrix Lestrange, Bartemius Crouch Jr and Rodolphus and Rabastan Lestrange)
Bertha Jorkins - (curse performed by Lord Voldemort)
Peter Pettigrew - (curse performed by Lord Voldemort)
Cedric Diggory - (curse performed by Viktor Krum while he was under the Imperius Curse by Barty Crouch Jr)
Harry Potter - (curse performed various times by Lord Voldemort)
Harry Potter - (curse performed by either Amycus or Alecto Carrow)
Avery - (curse performed by Lord Voldemort)
Neville Longbottom - (curse performed by Bellatrix Lestrange)
Neville Longbottom - (curse performed by various members of the dark arts class)
Bellatrix Lestrange - (failed curse performed by Harry Potter)
Ollivander - (curse performed by Lord Voldemort)
Andromeda Tonks and Ted Tonks - (curse performed by unspecified Death Eaters)
Rufus Scrimgeour - (curse performed by Lord Voldemort)
Hermione Granger - (curse performed by Bellatrix Lestrange)
Amycus Carrow - (curse performed by Harry Potter)
“Never used a an Unforgivable Curse before, have you, boy? You need to mean them, Potter! You need to really cause pain, to enjoy it, righteous anger won’t hurt me for long..” - (Bellatrix talking to Harry in HP-OotP)