Magus or Magna 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 plan to conquer Azeroth. Medivh contacted the orcish warlock, Gul'dan, and together they opened the Dark Portal, which allowed the Burning Legion to begin its destruction of Azeroth. He was slain shortly after by a party led by one of his friends, Lothar.
[FEAT] Arcane Brilliance - Activate to instantly restore 200 Mana to all nearby allied Heroes and grant them 10% Ability Power for 10 seconds.
[FEAT] Invisibility - Stealth an allied Hero for 20 seconds.