Xyston-class Star Destroyer

The Xyston-class Star Destroyer was a model of Star Destroyer used by Darth Sidious' Final Order. The Sith fleet consisted entirely of these warships and engaged the Resistance in a battle within the atmosphere of Exegol. They were based on the design of the older Imperial I-class Star Destroyers, with key differences including a larger size, red accents along the hull of the vessel, and a large axial superlaser capable of destroying planets, which took the place of a standard Imperial-class Star Destroyer's main hangar space.

Offensive and defensive systems
While equipped with deflector shields, the Xyston-class could not activate them while inside a planet's atmosphere. These Star Destroyers also required a navigational tower in order to leave Exegol.

Where the ventral hangar bay of conventional Imperial-class Star Destroyers was located, these Star Destroyers were fitted with a large axial superlaser and flanked by two smaller hangars. While it would not destroy a planet instantly like the superlasers of the Death Stars, the cannon would obliterate a planet by firing at the target in a sustained burst. These superlasers were connected directly to the Star Destroyer's reactor, and severe damage to them would destroy the ship itself.

History
Created sometime before 35 ABY, the Xyston-class Star Destroyers comprised the Sith fleet stationed on Exegol. When Supreme Leader Kylo Ren arrived on Exegol and met with Darth Sidious, the Sith Lord raised his entire fleet from the planet surface.

Following the duel on Kef Bir, Sidious ordered Allegiant General Enric Pryde to dispatch a Star Destroyer to Kijimi to destroy it as a show of force.

Appearances

 * Star Wars: Episode IX The Rise of Skywalker