The IUR Manticore is the personal ship of Admiral Osiris Xer. It is an Athron H12 Supergiant, one of the biggest ships in the universe.
The IUR Manticore was built on Capella, in a secret factory, for thirty five years. It is equipped with an elevated railcannon, which can produce thirteen gigahertz of power producing three million Newtons of force. It is amazing at decimating the front lines of ships.