Fiendfyre in the Room of Requirement

PAGES: 628-633

As Harry, Ron, and Hermione search the Room of Requirement for the diadem, Draco Malfoy, Vincent Crabbe, and Gregory Goyle confront them. Crabbe, in a reckless attempt to capture Harry, casts Fiendfyre, a cursed fire, which spirals out of control and destroys everything in the room. Harry, Ron, and Hermione narrowly escape on broomsticks, and they manage to save Draco and Goyle.