Its hangar facilities had enough room for several fighter squadrons. There was also a storage room for additional battle droid parts. Outlying control stations and sensors spanned out from the central sphere. The hangar bay doors could be activated from a panel on one of these.[3]
With the assistance of his newly purchased EG droid, EG-07, Grievous later began drilling to the core of Mustafar to uncover an ancient superweapon hidden under the planet and placed a battlesphere similar to Skytop Station above Mustafar. The Jedi thus began an investigation into the matter, sending Jedi MasterLuminara Unduli and CommanderGree to steal Separatist recognition codes from an archive in Grievous's castle on Vassek's third moon, which they used to infiltrate the Separatist-controlled space stationJuma 9, using the station's scanners to locate the superweapon on Mustafar. Meanwhile, Grievous had found the weapon and prepared to use the battlestation's superlasers to charge the weapon, so that it could fire and spread the deadly virus which would then destroy all life in the system. Having learned of Grievous's intentions, the Jedi dispatched Anakin Skywalker, Ahsoka Tano, Kit Fisto and CommanderCody to prevent the battlestation's lasers from charging the weapon. With Grievous' deception revealed, CountDooku forgave the general as Grievous' plans had bought Kul Teska the time he had needed to complete his gravitic polarization beam.[4]