Vorknkx

A Corellian Corvette in the service of the Galactic Empire during the Galactic Civil War. The Vorknyx took part in scientific research into a cloaking device for a small-sized craft. At the time, Imperial traitor Grand Admiral Zaarin was obsessed with having the latest technology wanted the Vorknyx and its research as his own. Grand Admiral Thrawn, who knew of Zaarin's obsession with technology, ordered the cloaking device to be sabotaged, rendering the device extremely explosive when hyperspace engines were used. Thrawn then allowed the traitor Admiral to steal the Vorknyx. Later, Zaarin fleeing his beseiged flagship, Imperial-class Star Destroyer Glory, took the Vorknyx and headed to hyperspace, cloaked, resulting in the destruction of the Vorknyx and of Zaarin.

Source
Star Wars: TIE Fighter