Mystra is a busy and devoted deity. She provides and tends to the Weave, the conduit that allows mortal spellcasters and users of magic to safely access the raw force that is magic. Essentially, Mystra is the Weave. As the goddess of magic, she is also the deity of the possibilities that magic can bring about, making her one of the most powerful beings involved with Toril. Although she is good and has the ability to prevent the creation of new spells and magic items that her philosophy opposes, she rarely exerts this ability unless the creation could threaten the Weave or the balance of magic in general.