Sith Magic

Also known as Sith sorcery, Sith magic was a power used by the early Sith, that complimented the use of conventional dark side-aligned Force powers.

The exact qualities of Sith magic were disputed, as were its exact relations to the Force. Some practices of Sith magic also delved into Sith alchemy, which was a different aspect entirely. Male practitioners of Sith magic were known colloquially as Sith sorcerers or magicians, while female users of Sith magic were known as Sith sorceresses or witches.

Nature
Though the exact nature of Sith magic is unknown, several individuals have attempted to describe it based on their own experiences. At times it is referred to as an aspect of the Force, at others as an unrelated phenomenon. Its applications seemed to require the use of incantations, objects or intricate hand gestures. Whatever the case, the practitioners of Sith magic all found its power as a viable means of bringing their goals to fruition.

Darth Bane described Sith sorcery as one of the most pure expressions of the dark side of the Force. According to Bane, Sith sorcery involved harnessing the deepest and most powerful energies of the dark side, and then twisting them to one's own will. Bane also stated that Sith sorcery is an extremely rare skill, one he himself is not capable of. Bane saw it as a way to warp reality, although it is unknown the extent to which this is possible.

Exodus Divergence
After the death of Darth Sideous and the extinction of his lineage Sith Sorcery was thought to be extinct. Later in 13 ABY Darth Sirena rediscovered the techniques from the Telos Holocron and Holocrons in Darth Sadis’s archive.

Spells

 * Invoke spirits


 * Summon darkness


 * Summon fear


 * Mind control (Sith magic)


 * Spell of concealment


 * False light side aura


 * Illusion (Sith magic)
 * Force blast

Information courtesy of Wookiepedia