the cruciatus curse

also known as the torture curse, was a tool of the dark arts and one of the three unforgivable curses. when cast successfully on the victim, the curse inflicted intense, excruciating physical pain on them, and would result in insanity if they were subjected to it for a prolonged time.

the killing curse

was a tool of the dark arts and was one of the three unforgivable curses. when cast successfully on a living person or creature, the curse caused instantaneous and painless death, without causing any injury to the body, and without any trace of violence. the killing curse was accompanied by a blinding flash or jet of green light and a distinctive rushing sound when being cast.