Arkady Duvall was a son of Ra's al Ghul.
Arkady studied in Heidelberg, and participated in the university's fencing club. Despite gaining a visible smite on his right cheek, he was the best of his class. But, he was also mentally unbalanced and arrogant.
After he finished his studies, he made the crossing to the Americas, and while on the East coast, he raped a woman (and possibly did other crimes as well). Sometime after this, he left for Devil's Hole to join his father, Ra's al Ghul, in the completion of the Phoenix. But because of his activities on the east coast, authorities placed a $200 bounty on his head. The bounty hunter and former soldier Jonah Hex accepted the assignment.
Duvall's brawling and behavior towards women made him unpopular in the local saloon, and it didn't take Hex long to get the locals to supply him with information. The barmaid of saloon, in particular wanted to help Jonah. Duvall was nearby, in an underground hangar, where the Phoenix was built. He had the same attitude towards the work force as he had to everyone else in his life, much to the annoyance of Ra's.
Hex was captured shortly after infiltrating the base, and Duvall in his arrogance failed to understand his purposes. He thought Hex was a government spy, bent on sabotaging Ra's' plans to destroy the railroad, rather than arrest him for his own crimes. Arkady wanted to dip him in molten lead, but Ra's intervened, again voicing disgust in his son's cruelty and unbalancedness. He had Hex imprisoned, to be questioned later. Duvall got an angry speech from his father, and any power he had in the operation was revoked.
Upon completion of the airship, Arkady joined his father at the bridge. After firing an initial volley at Devil's Hole, the ship was rocked by an explosion. Arkady went to investigate, and found Hex. The bounty hunter had already crippled the ship, but he also set off the hydrogen cells. Duvall engaged him with a sword, boasting superior fencing skills. Hex shrugged it off, and met him with a bowie knife he had picked up earlier. The two sparred in an unforgiving duel, until Duvall was hit by boiling steam from a cut-off pipe. Hex used the opportunity to disarm his opponent and throw him off the airship. They both landed on a small hill, while the ship crashed behind them.
Defeated, Arkady hoped to buy off Hex with five thousand dollars in gold, but the bounty hunter declined. He did answer Duvall's plea to let him live—but only because he thought it too much trouble dragging a corpse back twelve states. Back East, Duvall was sentenced to fifty years of hard labor. No-one expected him to survive the harsh treatment. But because of being exposed to the Lazarus Pit once when he was a young man his life had prolonged as a result. After being released from prison he wandered away. Sometime later, he was placed in a retirement villa in Gotham City. He spoke little, because the hardships he had faced shattered his mind. It took Ra's several years to track him down. After his location was confirmed, Ra's ordered his Society of Shadows to retrieve him. As his mind and body were beyond the Lazarus Pit's power to mend, Batman let Ra's take his son with him to die in peace.