Guardian Medivh (AKA the Last Guardian) is the last of the Guardians of Tirisfal. He was born inhibited by the spirit of Sargeras thanks to mistakes committed by his mother Aegwynn, which eventually manifested to make him open the Dark Portal from Azeroth’s side (year 0) and start the First War. Although he was killed for his actions, Aegwynn later resurrected him, albeit he would never show his powers again.