Blackstaff (Forgotten Realms: The Wizards, #1)

Khelben Arunsun, Chosen of Mystra, Archmage of Waterdeep, is as close to a demigod as you're likely to meet on the streets of Faerûn's mightiest city. But when the skies rain lightning and a long-forgotten city arises from the earth, he can seem like just another wizard.