X1's Executor-class Star Dreadnought

This Executor-class Star Dreadnought was a warship in the service of the Galactic Empire. Following the death of Emperor Palpatine at the Battle of Endor, this Star Dreadnought became the flagship of X1, a Force-sensitive clone and aspiring emperor. Following the New Republic's liberation of Cloud City on Bespin, X1 used the Super Star Destroyer to travel to Bast Castle, the former retreat of the Dark Lord of the Sith Darth Vader, on the acid rain-drenched planet Vjun to learn the secrets of the dark side of the Force.

The Star Dreadnought was later present above volcanic Mustafar, the de facto capital of X1's faction, during a New Republic attack on the planet. While New Republic troops on the ground were busy dealing with X1's forces, the Imperials raised a planetary shield—used in conjunction with a separate shield protecting X1's base—to prevent any New Republic reinforcements from arriving. X1's clone brother, X2, infiltrated the Star Dreadnought following a decoy assault and used the Super Star Destroyer's weapons to destroy the Imperials' shield projectors. Although the base's shields went down, the planetary shield remained operational, prompting X2 to ram the warship into the defensive barrier. The move deactivated the shield and allowed the New Republic's reinforcements to land. The Super Star Destroyer was destroyed in the collision, and its burning remains settled on Mustafar's surface.

Text and facts from the “X1's Executor-class Star Dreadnought” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.