magistra

A woman with power or authority, such as a teacher or archmage; a mistress.

Your grandmother must have provided assistance to the magistra at some point.

What the magistra hadn’t said was that a number of the other students were children, some as young as eight or nine.

A female magister.

Meditation has an important part in many witchcraft ceremonies, at least in the coven of which I am the Magistra or leader.

The magnificent Magisters and Magistras, profound Priests and Priestesses, wondrous Witches and Warlocks, astounding Agents, and the ever-inspiring loyal cohort that makes up the Citizenry of our Infernal Empire—you are an aristocracy of achievers, many of whom are cherished friends, and cannot know how very much you each mean to me.