The Black Swan
During Era-2, the Black Swan was one of the most feared ships in the galaxy. Usually spanning a full 50 km from stem to stern, she was the personal flagship of Yoxx-Leth the Eternal, Warlord of the 451st Lost Souls Division, the largest of the fractal legions of the dreaded Hand of Eris.
Yoxx-Leth, himself was said to have been one of the few survivors of the purge of Aldebaran 2, during the Great Reckoning. This was borne out by the dogged way the Black Swan pursued Imperial targets, and particularly the Purification Fleet.
The Black Swan's immense, shape-shifting bulk was rarely seen to look the same from one encounter to the next, but was always readily identifiable by her coloration, and the surging electrical discharges that surrounded her hull. The massive Aurora Drives that powered her journeys were said to have been designed by the infamous Dr. Cyclone.
Sometime around the end of the War of the Gods, the Black Swan, along with the entire 451st disappeared from the galaxy, never to be seen again.