#halolibrarian

[halopedia]

Lore Thursday — Vale Citadel

The Vale Citadel was a key location on the shield world of Requiem. The Forerunner known as the Librarian left an imprint of herself in the facility, allowing her to prepare John-117 to confront the Ur-Didact in 2557.

In 2558, Jul 'Mdama became interested in accessing the Librarian's imprint, though its interface only allowed Dr. Halsey to communicate with the Librarian. Halsey was given the Janus Key, which reveals the real-time location of every piece of Forerunner technology in the galaxy.