Dark Sith is the fallen Sith who being consumed by greed and hatred like Dark Jedi. Unlike Dark Jedi, Dark Siths have destructive natures that kills Jedi and Sith alike as well the two armies. The sole Dark Sith is Zel'katana, the former Sith that gains X-BEAST powers by combining with her Sith powers.
Cad Bane reveals that the Siths are become corrupted by the mysterious powers that been never discovered.
List of the Dark Sith
- Zel'katana - Formerly known as Darth Zel'ka, the previous Sith Lady