Margaret C. Ingalls a.k.a. Maggie Cassady and Margarete Ingalls, who wrote as Nema, Nema Andahadna or Soror Andahadna (died January 9, 2018) was an occultist and writer best known for her magical writings about the Ma'atian current. She practiced and wrote about magick (magical working, as defined by Aleister Crowley) for over twenty-five years. From her experience with Thelemic magick (a system designed by Crowley), she developed her own system of magic called Maat Magick which has the aim of transforming the human race. Her writings have appeared in many publications, including the Cincinnati Journal of Ceremonial Magick, Aeon, and Starfire.