In Which Luna's Tranquil Streak is Broken

"The Draught of Irascibility, when brewed correctly, produces acute and long-lasting anger, irritability, and inexplicable short-temperedness in the drinker, no matter how mild his or her natural temperament may be..." The seemingly ever-placid Luna makes history in the first display of Lovegood rage since 1701, with a little help from her creative antagonists.