Malachor III expedition

The Malachor III Expedition was a Mission undertaked by the Jedi Order around the time of the Great Galactic War on the dead Sith Planet ofMalachor III in hoping to found ancients sith secrets. Unfortunally the Jedi sottovalutated the dangers of the place and send only six Padawans, Parkanas Tark, Yuon Par, Duras Fain, Sidonie Garen, Eriz Vossan and Cin Tykan. Their arrive awakened the dark spirit of dead Sith Lord of the resurgent Sith Empire Terrak Morrhage. Morrhage's spirit played with the emotions of the youngs Jedi and drove them insane. While the rest of the team managed to escape to planet, Tark was left behind to be tortured by Morrhage and, eventually, Morrhage's dark spirit corrupted and possessed him.

Appareance
Star Wars: The Old Republic