The Mission to Mustafar was a mission carried out by Rianna Saren. After she learned that a new drug was used on Mustafar to increase the slave production of mirkanite, a material used in construction of turbolasers, she went there to stop the production. She also hoped to find Zarien Kheev, a slaver who cut off her lekku.
Rianna and Zeeo infiltrated the facility and sliced the computer. They learned that the mirkanite was delivered to Despayre and that Zarien Kheev wasn't on Mustafar. They continued thier mission and soon found a group of Wookiee slaves who managed to escape. One of the Wookiees gave them access codes to the main computer. Using those codes Zeeo deactivated the drill shaft and Rianna set off explosives to destroy the entire facility. They also tracked Kheev to Tatooine and Rianna decided that her time with the Rebellion was over and decided to follow Kheev to get her revenge on him .