Crucio

The Cruciatus Curse (also known as the Torture Curse) (Crucio) is a tool of the Dark Arts and one of the three Unforgivable Curses. It is one of the most powerful and sinister spells known to wizardkind. When cast successfully, the curse inflicts intense, excruciating pain on the victim. Considering that the curse does not physically harm the victim, it is possible that it only stimulates pain receptors.