The avatar of Sargeras is an incarnation of the lord of the Burning Legion believed to be created from part of Sargeras' spirit. It is said that his avatar only holds a mere fraction of his true powers. The second time that Sargeras entered Azeroth was in the form of an avatar. Aegwynn, the Guardian of Tirisfal at the time, detected Sargeras's presence, hunted his avatar down and defeated it in combat. She "destroyed" the avatar with a single spell, or so she thought — in reality, Sargeras just implanted himself inside her womb, ensuring that the next Guardian would contain his demonic essence.