But in the fourth volume events take a grim turn, as the careless schoolboy becomes aware that Professor Starr has in his laboratory a magic dress that could destroy all his and Hillary’s plans. In Billy Clinter and the Chamber of Semen, Billy realises that he splinched while he was apparating, which had never happened before. This is all the fault of Moaning Monica, the intern who haunts the anteroom at Housewhites and has the rare power of Parcelmouth, the ability to look into the eye of the Basilisk, the world’s smallest snake, without being petrified. Is she a Niffler or a Death Eater? Billy cannot be sure. He looks to Housewhites’ giant shambling groundskeeper Reno to protect him, but she’s busy raining down fire on strange cults. As the book ends, their old friend Albus Bumblegore fails to become Headmaster of Housewhites after insufficient chads are found in his sorting hat.