Dark Arts referred to any magic that was mainly used to control, harm or kill its target. Brewing harmful potions, using hexes and curses, and breeding dark creatures could be illegal, not only because of the terrible consequences of using it but also for the corrupting nature of the practice which affected the practitioner themselves. The use of the Dark Arts was also commonly linked with affiliation with wizarding supremacy and support of Dark wizards, Lord Voldemort and Gellert Grindelwald. Although it was impossible to entirely defeat the Dark Arts young wizards were taught how to recognise it and defend themselves against Dark magic.