411 REFERENCE · Wikibooks
Final Fantasy/Key Items/Key
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
The Mystic Key opens the doors to the Treasury of Coneria as well as a number of other locked doors throughout the world, including two doors in the Temple of Fiends and the door to the treasury of Elfland. It was given to the Prince of Elfland for safekeeping when the Four Fiends reappeared and the artifacts of Coneria were sealed in the Treasury.