Spells Learned in Defense Against the Dark Arts Expecto Patronum - Protective spell used to repel Dementors and other dark creatures. Lumos - Used to light the tip of a wand, useful in the dark. Riddikulus - Used to transform a Boggart (a shape-shifting dark creature) into something funny and harmless. Expelliarmus - The Disarming Charm, used to disarm an opponent by causing their weapon or wand to fly out of their hand. Stupefy - The Stunning Spell, which temporarily stuns a target, rendering them unconscious for a short period.
