During the Imperial Era, the Imperial Navy utilized the Cataclysm, an Onager-class Star Destroyer. This Star Destroyer was once positioned in proximity to a pair of gravity wells, during which time it was approached by a Lambda-class T-4a shuttle that had two TIE fighters escorting it. The Cataclysm's armaments included engines, two superweapons mounted at its front, and a pair of deflector shield generator domes. Being an Onager-class ship, the Cataclysm measured 1,288 meters long.
The Cataclysm initially appeared on a card of the same title within the 2020 Onager-class Star Destroyer Expansion Pack. This pack served as an addition to Fantasy Flight Games's miniatures game, Star Wars: Armada.