Frost: The Thieving Apprentice

“The Focusing Iris has been stolen from the Dalaran Vaults! The thief was a mage of some skill, but we've been unable to track him. Fortunately, the thief dropped a note from his master, addressing him as one of his "apprentici." I know of only one mage who uses that particular pluralization - Archmage Xylem. I'll need you to investigate. In Azshara you will find his tower where he trains his apprentices. Go there, and see what Xylem is up to. Specialization: Frost Death Knight”