the same planet that The Fallen Jedi lost and was badly burned after being caught in flames by one of Mustafar's lava rivers, forcing him to wear dark armor to live. to be Darth Vader Mustafar was a very young and volatile world, made apart by opposing gravitational forces of the gas giants Jestefad and Lefrani, with the former being the closest of the two. Astride thick-skinned lava fleas, the native Mustafarians leapt across the lava fields to mine the planet's unique and valuable minerals present in the lava. The intense geological activity creates natural scanning interference that has kept prying eyes away from Mustafar for most of its history. The Mustafarians oversaw the mining facilities constructed by the Techno Union on the planet you go to Mustafar [choose age and gender]