Adapting the Collective's Damavik-class frigate design, the Nergal's basic premise is to turn the Triglavian light hull into an assault frigate that builds on the powerful capabilities of the core ship frame. The Nergal has been modified using a variety of designs but draws principally from the popular Enyo-class assault frigate, using the Triglavian energy systems and the light entropic disintegrator capacity create a fearsome attack ship.

As an assault frigate, the Nergal has improved microwarpdrive signature radius damping and can use an assault damage control for enhanced defense. This compact brawler also benefits from increased entropic disintegrator range and damage, while its Triglavian core systems give it advantages in the use of energy neutralizer and pulse weapons, as well as remote armor repairers.