Onyx-class battleship

The Onyx-class battleship is large warship employed by the forces of the Obsidian Navy, the space-borne combat arm of the Xai Ascendancy. Originally built in 756 AXE, the Onyx-class battleship was the first true capital ship developed by the Xai for entirely war-related duties. Often regarded as the "Big Stick of Xyon", the Onyx-class is regarded by the Xai as a symbol of their power throughout Xai'athus, and the near omnipotent will of their god and creator. Since the reorganization of the Black Fleets of Xyon, the Onyx-class battleship is the mainstay of the Obsidian Navy. Because of its size, crew requirements, and cost, the warship is often relied upon to project Xai military power across the galaxy, and ensure that the law of Xyon is felt wherever the Xai spread their influence.

Characteristics
"Onyx battleships are being spotted everywhere. The Xai are clearly up to something."

- Ailen Gillaciaran

Dimensions
All Onyx-class battleships ever produced have been approximately 1,992 meters in length, including all variants past and present. This would make the Onyx battleship more than a mile long, dwarfing many smaller ships such as those found in the Defiance. Compared to those ships, the Onyx is a massive warship only out scaled in sheer size by the Xyon-class mothershi[ and Black Lotus-class dreadnaught. Given its size, the Onyx has come to represent the industrial, economical, and military prowess of the Xai Ascendancy as well as the might of the Obsidian Navy which wields these beasts, serving as a visual testament to the power of the Xai military forces.

Crew requirements
According to official government documents, the Onyx-class battleship has a crew requirement of 42,360 naval personnel, of which 8,472 are officers, and 33,888 are enlisted crew members and gunners. A standard battleship can hold up to three battalions of Obsidian Army personnel, for a total of 14,194 troops plus support personnel. This would increase the size of the ship crew to 56,554. This would include the flight crew and technicians, as well as the ground disembarkment forces. Recreational facilities would be included into the ships design so as to keep the crew entertained during their long deployments throughout their sectors, as well as guest rooms for VIP passengers the ship might be assigned to transport throughout the Ascendancy.