Ra's al Ghul (Desert Duel)
Once Batman discovered Ra's al Ghul's villainy, he went on a crusade to stop his immortal foe. The quest culminated with Batman tracking Ra's to the desert, and engaging him in a sword duel to the death. The duel lasted for hours, until a scorpion stung Batman. Ra's left his opponent in the desert to die, but his daughter Talia gave Batman the antidote.