Book 5 | Ch:13 - Detention with Delores

SPOILERS:

Hermione stops the twins from experimenting on first years, Ron tries to stop unknowing house-elves from taking Hermione’s knitted hats, and Professor Grubbly-Plank teaches Care of Magical Creatures as there is still no sign of Hagrid.

Harry serves Umbridge’s detentions, in which an enchanted quill cuts lines into the back of his hand, and Ron tries out for and makes the Gryffindor team as Keeper.