The archmage has recently locked himself away in his tower. If you wish to enter, you'll need help from some of his apprentices. I'm afraid you won't get it dressed like that.
Xylem has a thing for... outfits, and his apprentices use them to show rank. If you wish his apprentices to help you, you'll need to appear their superior. Such is their desire to impress the archmage, many of his apprentices will battle each other for the best pieces.
I think you know where this is going.