Arc 2Fluffy’s Hidden Room
William earned Ravenclaw points through dangerous classroom rescues while learning that Hagrid was hiding an illegally acquired three-headed dog. After Snape was taken for questioning, William helped Hagrid and Charlie move Fluffy into the Room of Requirement, where a break-in at Snape’s storeroom drew the professors’ attention.
- William brewed a Cure for Boils potion that healed Snape and Marietta, then received fifty Ravenclaw points from Dumbledore, who warned him about revealing Hogwarts’ secret passages.
- William joined George and Fred in examining a stolen Hogwarts map, while Professor Tywin’s Defence class turned dangerous when Judy Crouch accidentally removed his leg bones and Grindylows escaped their tank.
- William killed a Grindylow and organized the students to fight the others, then learned that Tywin and Snape had a bitter history involving James Potter.
- William, Cedric, and Cho discovered Hagrid was hiding Fluffy, and a newspaper clipping led William to suspect the dog had been smuggled from the Ministry’s Department for the Regulation of Fantastic Beasts.
- William reasoned that the Ministry was using Lucius Malfoy as a scapegoat, while Cedric won a place as Hufflepuff’s youngest Seeker and William rescued Summerby from Devil’s Snare.
- Fudge took Snape away for questioning, and Hagrid later asked William, Cedric, and Cho to help hide Fluffy until Charlie could take him to Romania.
- William, Cedric, Cho, Charlie, and Hagrid moved the sleeping Fluffy into the Room of Requirement, where they left him beside a broken Vanishing Cabinet.
- An alarm revealed a break-in at Snape’s potions storeroom, and Professor McGonagall and Professor Tywin investigated as Filch accused the Weasley brothers.