The Guardian Aegwynn grew powerful over the years and used the Tirisfal energies to greatly extend her life. Foolishly believing that she had defeated Sargeras for good, she continued to safeguard the world from the demon kingâ€™s minions for nearly nine hundred years. However, the Council of Tirisfal finally decreed that her stewardship had come to an end. The Council ordered Aegwynn to return to Dalaran so that they could choose a new successor for the Guardian power. Yet Aegwynn, ever distrustful of the Council, decided to choose a successor on her own. The proud Aegwynn planned to give birth to a son whom she would divest her power to. She had no intention of allowing the Order of Tirisfal to manipulate her successor as they had tried to manipulate her.
Traveling to the southern nation of Azeroth, Aegwynn found the perfect man to father her son: a skilled human magician known as Nielas Aran. Aran was the court conjuror and advisor for Azerothâ€™s king. Aegwynn seduced the magician and conceived a son by him. Nielasâ€™ natural affinity for magic would run deep within the unborn child and define the tragic steps the child would later take. The power of Tirisfal was also implanted in the child, yet it wasnâ€™t to awaken until he reached physical maturity. Time passed, and Aegwynn gave birth to her son in a secluded grove. Naming the boy Medivh, which means â€œkeeper of secrets” in the high elven tongue, Aegwynn believed that the boy would mature to become the next Guardian.
The malignant spirit of Sargeras, which had been hiding inside her, had possessed the defenseless child while it was still in her womb. Aegwynn had no idea that the worldâ€™s newest Guardian was already possessed by its greatest nemesis. Certain that her baby was healthy and sound, Aegwynn delivered young Medivh to the court of Azeroth and left him there to be raised by his mortal father and his people. She then wandered into the wilderness and prepared to pass into whatever afterlife awaited her. Medivh grew to become a strong boy and had no idea of the potential power of his Tirisfalin birthright.