The Portable Swamp was created when Fred and George Weasley planted it on the way to Professor Umbridge's Office. Once they fled Hogwarts to set up Weasleys' Wizard Wheezes in Diagon Alley, they left no instructions on how to remove the swamp, forcing Argus Filch to help students across it. Professor Flitwick later removed it after Umbridge was sacked as Headmistress at Hogwarts, leaving only a small patch. Although Flitwick claimed to have left it as it was "a good bit of magic", Ron Weasley believed it was actually left as a tribute to the twins.
Behind the scenes
- It is also used in Harry Potter and the Order of the Phoenix (video game), when Harry Potter swamped Hogwarts' courtyards with it in order to force Umbridge to leave Hogwarts.
- Portable Swamps are interactable objects throughout LEGO Harry Potter: Years 5-7; they help the player pass many levels.