Defense+Against+the+Dark+Arts

//Find a piece of dark magic and tell us why you think it's illegal. //

Avada Kedavra, the killing curse is illegal because no person has the right to take another's life.

The Cruciatus Curse makes a person feel excruciating pain. It is illegal because it is torture and can make people lose their minds from the pain (see Neville Longbottom's parents)