Mystra is a fictional goddess in the Forgotten Realms campaign setting for the Dungeons & Dragons fantasy role-playing game. She is the Mistress of Magic and Mother of Mysteries who guides the Weave of magic that envelopes the world. She tends to the weave constantly, making possible all the miracles and mysteries wrought by magic and users of magic. She is believed to be the embodiment of the Weave and of magic herself, her veins the ley lines, her breath the mists and her body the pulsing, thrumming earth.