Mustafar was a small planet located in the Outer Rim. The terrain was composed primarily of volcanoes and boiling lava rivers and fields, from which magma was harvested as a resource by the local miners. During the Clone Wars, the Techno Union established facilities on the surface to use the planet's rich but deadly resources to fuel the Separatist's war effort.
History[]
Darth Sidious's secret laboratory
The planet also hosted a secret laboratory owned by Darth Sidious for experimentation on Force-sensitive younglings. However, when Anakin Skywalker and his Padawan Ahsoka Tano discovered the lab and rescued the children, Sidious had the facility's gravity supports deactivated to the building would fall into the lava river below.
The planet was also home to the base of operations for Black Sun. In 20 BBY, Darth Maul came to the base seeking the organization's allegiance to the Shadow Collective. After their refusal, Savage Opress decapitated the entire council, persuading Ziton Moj to agree to join their cause.
In 19 BBY, Darth Vader flied here to slaughter all of the Separatists council thus ending the Clone Wars. When the deed was done, he told the emperor to shut down all of the droid army. It was not long until the heavily pregnant Padmé Amidala arrived in an attempt to bring Vader back to the light. After seeing his former master, Obi-Wan Kenobi who had stowed away onto Padmé's ship, he force choked her in retaliation. Seeing the man who taught him the ways of the Jedi led straight directly into a duel. The duel ended after Obi-Wan cut off Vader's arms and legs. Obi-Wan told Vader that he was supposed to be the Chosen One to bring balance to force, took his lightsaber away, and confessed that he was his "brother" but now gone forever leaving Vader's body to burn to a crisp. Obi-Wan flied Padmé's ship along with her to the Possa Massa asteroid to prepare for her labor of Luke Skywalker and Leia Organa. Meanwhile, the Emperor arrives to bring Vader's corpse back to build him a new life support.