Mystra

Mystra, also known as 'The Mother of Magic' or 'The Wanderer', is the Goddess of Magic and Knowledge, and the Lady of Mysteries. She is one of the deities that form The Pantheon.

The Plane of Existence she governs is the Astral Plane. Aratal was able to enter this Plane using the Robe of Stars.

During the events of the Planesmeld at the dawn of the Age of Heroes, Mystra's light entered Aratal, making him Mystra's champion. When Aratal entered the Astral Plane after the events of Darrowstead, Mystra answered his questions and bestowed a great power onto him.