"The Incubi will attack you from behind, tickle you, pull your hair and cling to your clothes to scare you, but you don’t let yourself be fooled. Attack them with all the Spells you can." The teacher resumed. "They seem incorporeal, but they’re not. The more you attack them, the more energy they’ll lose, and eventually they will go away. Some spells will be more effective than others, but if you persist enough, you’ll still be able to get your way. Is everything clear?" Rose tightened her grip on her wand, determined not to panic. A series of murmurs of assent confirmed to the professor that the class was mostly ready. "I'm about to open the trunk... Alohomora. Go!"