Shar, 'Mistress of the Night', 'Nightsinger', 'Lady of Loss', or 'The Darkness' is a fictional deity in the Dungeons & Dragons Forgotten Realms campaign setting. She is the evil counterpart to her twin sister Selûne, and presides over caverns, dark, dungeons, forgetfulness, loss, night, secrets, and the Underdark. Shar is an ancient goddess, formed together with her sister at the beginning of time, out of the empty nothingness that existed before gods or mortals.