Duel on En'rg-ch

Arriving on En'rg-ch, Darth Tyranus was attacked by Kaxs, who believed him to be a Jedi. However, after a fierce duel, Darth Tyranus defeated Kaxs. When Tyranus revealed he was a Sith, however, Kaxs offered his services.

Aftermath
Following the duel, Kaxs became Darth Kaxs of the En'rg-chan Sith Alliance.