watch 02:32 The Loop (Games) Do you like this video? Reliquiarium Key Description: This elaborately decorated key supposedly opens the door to the Sacrarium's reliquiarium. Obtained: Check the ??? after defeating Old Professor Mariselle during Promathia Mission 4-3: Sacrarium. Retrieved from "https://ffxiclopedia.fandom.com/wiki/Reliquiarium_Key?oldid=1499937" Categories: Key ItemsPermanent Key ItemsOpen Doors Key Items Languages: Deutsch Community content is available under CC-BY-SA unless otherwise noted.