Warcraft Wiki:Featured articles/Medivh
Medivh was the last Guardian of Tirisfal, an ancient line of protectors bestowed with great powers to do battle with the agents of the Burning Legion. He was corrupted even before birth, and possessed by the spirit of the demonlord Sargeras who used Medivh in his schemes to conquer Azeroth. Medivh contacted the orc warlock Gul'dan, and together they created the Dark Portal, which allowed the Old Horde to begin its invasion of Azeroth. He was slain during the First War by a party led by one of his friends, Anduin Lothar.
Shortly before the beginning of the Third War, Medivh returned as a mysterious prophet, manipulating events in order to arrange the formation of a last-ditch alliance between the mortal races on Kalimdor, guiding them to victory at the Battle of Mount Hyjal. The prophet's name means "keeper of secrets" in Thalassian. He also once possessed the legendary Atiesh, Greatstaff of the Guardian.