The Duel on Sojourn occurred in 67 BBY on the planet of Sojourn, where Hego Damask, the Muun Sith Lord Darth Plagueis resided after he hosted the Gathering there. After he hosted his event, his Sun Guards brought news that an intruder penetrated the building's defenses. Plagueis immediately sensed a Force-sensitive being, whom he at first perceived as a Jedi. In the forests, he confronted the disturbance, a Bith with a Sith lightsaber. At first, he believed it to be his former Master, Darth Tenebrous, then perceived the Bith as Tenebrous's offspring, a product of Bith science. The Bith identified himself as Darth Venamis, and that Plagueis' death would legitimize the Darth title.