The Gozir Dellso's Droid foundry was a droid creation facility on the volcanic Planet of Mustafar, built on the side of a mountain, overlooking a lava river, close to the Klegger Corp Mining Facility. It was owned by Klegger Corp, which in turn served the interests of the Techno Union.
During the Galactic Civil War, Gizor Dellso reopened the Droid foundry and started building his own army of Battle droids, stepping on the side of the Separatist holdouts. One of his most important creations of Gizor Dellso was the construction of another type of super battle droid.
As Gizor's army grew day by day, the Empire sent the 501st Legion to Mustafar to destroy the Droid foundry. 501st troopers were deployed on a landing platform outside the droid facility on Mustafar. Many had just stepped foot on the platform when droids shot them dead from the open windows of the entrance corridor. As B2 super battle droids scurried out onto the landing platform, the 501st was able to repel them. They managed to secure their landing zone, then, taking losses, flooded the corridors and stormed the lava observatory room, which gave them access to an outside walkway. Despite battle droid snipers firing at them, the Stormtroopers were able to capture the walkway.
A Stormtrooper carrying an orbital strike beacon had been shot, and once retrieved, the beacon was set on the overlook to signal for the orbiting Star Destroyer to bombard the base.
However, Gizor Dellso and his Geonosian bodyguards arrived to destroy the remaining Stormtroopers, a wild firefight began. Though many stormtroopers were slain, Gizor Dellso was killed along with his remaining droids.
The troopers had just enough time to depart when their overhead forces executed an orbital bombardment command on the Mustafar complex, completely demolishing the droid factory.
- Star Wars: Battlefront II (First appearance)