Qordis
this ancient Sith Lord existed only as a spirit avatar when the Brotherhood of Darkness was destroyed on Ruusan. Lord Qordis had been part of the command structure put in plance by Lord Kaan, and had died in the explosion of the thought bomb that killed everyone on Ruusan - except his student, Darth Bane. Qordis appeared to Darth Bane shortly afterward, aboard the Valcyn, belittling Bane and calling him a coward for having survived the detonation of Lord Kaan's thought bomb. Darth Bane refused to be baited by Qordis' spirit, however, so Qordis extended one last time beyond the grave and severely damaged the Valcyn, shortly before it arrived on Dxun. Qordis hoped to make Darth Bane's life a living hell, for having survived Ruusan.