The Duel on Ronu II was a conflict between Guan Blackthorne and his brother. Guan, believing that he needed to convince his brother to return to the Jedi Order, traveled to Ronu II with Ryy'Suuk and Neddac. There, he found Jerik, who had proclaimed himself as Darth Odium, a Sith Lord, and tried to convince him to turn away from the path he had taken. Jerik refused, and after offering Guan twice to join him and his Sith Order, engaged his brother in a fierce duel in the dense jungles of the planet.