Unfortunately, the Duke of Hedrick encountered Rodhart, the condemned Retribution Knight who almost destroyed the entire Breezy Plains. Rodhart made the level-22 Legendary Sword Sage seem insignificant even though the two of them were both powerful. Although Hedrick relied on the Twilight Dragon Armor to increase his strength by one level, he was still worlds apart from the level-25 Retribution Knight Rodhart.
Actually, Hedrick could have avoided the battle at first. Although he was no match for Retribution Knight Rodhart, he could've still escaped death easily. However, not only did he not shun the fight, he even voluntarily battled Rodhart despite knowing that he was no match for him. He did that all for the sake of buying some time before Prophet Willen of the Brilliance Shrine arrived.