Some basic ideas for one of the largest available ship types used by the Imperium Sublime. Despigned by Utopis Fleet Concern and operated by a crew of over 250,000. The 21km long Ultanas class is a behemoth use primarily as a means of force projection. Although boasting a 52m calibre relativistic cannon, the primary strategic value the ship type offers is the ability to carry entire armies and fleets, acting as a mobile castle or military base for Imperial expeditions.

The extreme expense of building and maintaining such vessels mean only a handful exist for the galaxy-spanning Imperium. The Imperial flagship being the HEMV Dominax, commanded by the lord-admiral Larnus Ontarion.