The Red Engine was a mysterious Sith artifact created by the Sith Lord Tulak Hord. This infernal machine was powered by hate and blood where it contained hidden teachings of its creator. It was placed within the Tomb of Tulak Hord and after his death it was said in legend that anyone that unlocked the its secrets gained Hord's knowledge. However, despite many studies by scholars, none had managed to uncover the secrets of this terrible machine and gave up after being thwarted by the complexities of this sinister creation.
During the Cold War, the researcher Ephran Zell tasked an unidentified Sith with travelling into the machine vault of Tulak Hord in order to activate the Red Engine and fuel it by killing any creatures near it.
- Star Wars: The Old Republic (First appearance)