The Conjurers of Stormwind, also called the Conjurers of Azeroth, were a secretive sect of Magi prior to the First War who would only gather and train in their own specially-prepared mystic towers in the Kingdom of Stormwind, also known as the Kingdom of Azeroth. The most famous conjurer of the time was Nielas Aran, Court Conjurer and father of Medivh, the Last Guardian. After the conclusion of the First War, the order was utterly decimated by the Horde, but their legacy lived on with the mages who participated in the Second War who would later go on to form the Stormwind Circle of Magi.
References can be found on the talk page: https://moon-guard.fandom.com/wiki/Talk:Conjurer_of_Stormwind