Sith sorcerer

A Sith sorcerer or sorceress was an individual who was proficient in the arts of Sith magic. The term was synomymous with Sith magician, and females who dabbled in Sith magic were sometimes referred to as Sith witches.

History
Sith sorcerers were prevalent during the time of the Old Sith Empire. One of the most famous and earliest known magicians was the Dark Lord of the Sith Naga Sadow. Lord Sadow initiated at least one known apprentice in the ways of Sith magic, a young human male named Gav Daragon. Gav did not finish his apprentiship though, and so never fully attained the full abilities of a Sith sorcerer.