Khelben "Blackstaff" Arunsun, Lord Mage of Waterdeep, is a fictional character of the Forgotten Realms campaign setting for the Dungeons & Dragons fantasy role-playing game. Khelben is the brainchild of Forgotten Realms creator Ed Greenwood and Realms game designer Steven Schend.
One of the powerful spellcasters who also counts himself amongst Mystra's Chosen, Khelben is a serious, imposing wizard, and a grim proponent of law and order whose methods of achieving the ultimate good are often highly questionable in the eyes of the righteous. One such deal — with Fzoul Chembryl, cleric of Bane and leader of the sinister Zhentarim — led to the once highly regarded member of the semi-secret Harper organization being simultaneously expelled and leaving the organization. Khelben did not leave alone, however; he now leads the Harper splinter group the Moonstars, whom he finds suit his needs much better.
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