Room-sealing spell

This spell was used to seal a room, so that no one but a wizard could enter.

Severus Snape cast this spell on his office at Hogwarts Castle. Barty Crouch Jr. (under the guise of Alastor Moody) broke the seal in order to steal Boomslang skin from Snape's personal stores, so he could keep making Polyjuice Potion.

Behind the scenes

 * The seal is seen in the GBA video game adaptation of Harry Potter and the Chamber of Secrets. In the game, the Headmaster's office is locked by a similar spell, instead of being concealed by a ugly stone gargoyle.

Appearances

 * Harry Potter and the Chamber of Secrets (video game)
 * Harry Potter and the Goblet of Fire