Isotope-5 droids were a class of potent battle droids built by the Hutt Cartel and powered by the rare substance called Isotope-5. Among its class was Toborro's own Glittering Fury, the renegade Golden Fury and a version able to be equipped and controlled by the Archon Szajin. Several of the droids were drowned in lava by an Imperial strike team, although rudimentary and prototype versions survived to be used in later skirmishes during the Conquest of Makeb.