Kalakar Six

Kalakar VI was a volcanic moon of Kalakar in the Outer Rim's Kalakar system. It was a Dark Side nexus which attraced a cult about 100 BBY. It was covered in lava flows, its crust riddled with magma tunnels. Darth Vader came to the moon in an attempt to intercept the Rebels carrying the Death Star I plans. The Rebels were not there: Vader had been lured to the moon with false information by Dark Siders whom pitted Vader against a clone of Darth Maul. Vader killed the pseudo Maul. Palpatine himself arrived on the moon in a Lambda-class shuttle, killing the Dark Siders and retrieving Vader. Vader suspected the entire ordeal had been a test arranged by the Emperor.