Time of Troubles
Elminster also confronted the overgod, Lord Ao, over his instigation of the Time of Troubles while innocents were being killed. As the critical moment of the Time of Troubles approached, Mystra knew of what was to come and shed most of her power into the human wizard Midnight, so that all of her essence would not cease to exist. Since Elminster obtained his power from Mystra, this change left him personally powerless at a critical juncture.