"Who braves the flames of the Altar of Horror to stand in front of Lord Barel-Slathborn, Lord of the Sith?"
―Commander Gargun, possessed by Barel-Slathborn's spirit[src]

Barel-Slathborn was a male Sith Lord of the old Sith Empire who was among the first inhabitants of the planet Dromund Kaas. After his death, Barel-Slathborn's spirit was trapped within the Dark Temple, and it possessed Commander Gargun when the man entered the temple.