|We must've been through hundreds of books already and we can't find him anywhere —|
At least some content in this article is derived from information featured in Harry Potter: Wizards Unite. As such, spoilers will be present within the article.
For gameplay-specific information, please see the relevant article on the Harry Potter: Wizards Unite Wiki!
These rooms were located somewhere in the British Ministry of Magic, presumably in the Department of Magical Law Enforcement. They could be booked by the personnel at the Auror Office, who would use them in order to hone their skills. Little is known about them, except for the fact that they had ample space for spell-casting, and that they provided various obstacles for their Aurors to tackle as part of their training.