Avada Kedavra

Avada Kedavra is a fictional spell from the "Harry Potter" series by J.K. Rowling. It is known as the Killing Curse, and when cast, it causes instant death to the target without any physical harm. The spell is characterized by a flash of green light and is one of the three Unforgivable Curses, which are considered the most dangerous and morally reprehensible forms of magic in the wizarding world. Using Avada Kedavra is punishable by a life sentence in Azkaban, the wizarding prison, reflecting its severe implications and the dark nature of the magic associated with it.