"When the Foundable Spell was cast, these Fortresses appeared across the world, trapping the rares and most powerful Foundables inside. Hermione thinks that the Challenges found within Fortresses could be some sort of magical test." —Harry Potter's description of Fortresses[src] A Fortress was a magical structure found all throughout the wizarding world following the outbreak of the Calamity and accessed by the Statute of Secrecy Task Force through the use of runestones. Appearances Harry Potter: Wizards Unite (First appearance) Notes and references ↑ Harry Potter: Wizards Unite (see here) This article or section is a stub. You can help by expanding it. Retrieved from "https://harrypotter.fandom.com/wiki/Fortress?oldid=1269403" Categories: Articles with information from Harry Potter: Wizards Unite Stubs Locations Magic Community content is available under CC-BY-SA unless otherwise noted.