The Force crystal of Naga Sadow was a force crystal that presumably belonged to Naga Sadow, the Dark Lord of the Sith who ruled the Sith Empire during the Great Hyperspace War in 5000 BBY. Although the existence of the Force crystal of Naga Sadow was debated by the time of the Battle of Yavin, it was still sought by treasure hunters. The explorer Riyan Kiner became utterly insane after spending his life looking for this fabled artifact.