Kalakar Six
this desolate moon was covered with active volcanoes and lava flows. Much of its crust was riddled with tunnels created by intense magma floes. Darth Vader was believed to have visited the moon shortly after the plans for the first Death Star were stolen by agents of the Alliance, hoping to intercept the plans and eliminate the rebels. Kalakar Six was rumored to have been a nexus of the Dark Side of the Force, a rumor which drew Baron Yorn and his followers to the moon a century before the Battle of Yavin. When Vader arrived on Kalakar Six, he discovered a group of Dark Side adherents who had become disillusioned with Vader himself, claiming that too much of Anakin Skywalker had remained in him. The information about the Alliance agents was planted by the heretics, to lure Vader to the moon. They created a clone of the Zabrak Sith Lord, Darth Maul, and hoped to have the clone defeat Vader. The adherents then planned to present the clone to Emperor Palpatine, as a testament to their devotion to the Dark Side of the Force. Unfortunately for them, Vader was able to defeat the clone, and Emperor Palpatine himself destroyed the adherents.