Mystryl (MISS-trihl), the Lady of Mysteries, was a greater deity and the first incarnation of the goddess of magic. Later incarnations of the goddess were named "Mystra". Mystryl was most notably known as the being who embodied the Weave, the primary source of magic in the cosmos. She supplied and regulated magical energy to all, making possible spells and magical effects. But her portfolio also included knowledge and energy, invention and creativity, song, time, and the season of spring.