This symbol served as a Sith tattoo, displayed prominently on the brow of a Shadow Hand. Ulic Qel-Droma, who served as the Shadow Hand for the Dark Lord of the Sith Exar Kun, bore this mark. Back in 3997 BBY, Marka Ragnos, the spirit of a deceased Dark Lord of the Sith, used his power to brand Kun with the mark of a Dark Lord, and Qel-Droma with the Shadow Hand's variant.