You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
You have to do the main quest line in order to progress with the Mirage quest. So go and talk to Basel and then do a couple quests for him and then it will open up. THIS is not a spoiler :P If your at this point then you should know who Basel is.