Grendel: Devil’s Odyssey #6

Decades of searching have finally led Grendel Prime and Sigma-Seven to the planet Bojan Feq, which has an environment similar to Earth's and where civilization exists at medieval-level technology and is shared between three different intelligent species. But the entire culture operates under a feudal system and centers around a ritualistic form of combat known as "the Ordeal," which Grendel Prime must navigate through.