Have the option to build a areana were you as the lord can entre and show off your fighting abilities, winning will grant you respect from your subgects and some money and losing will have you lose there respect, in also will have its uses as a sorce of income from ever occuring events every turn, I think this is a intresting mecanic because this opens the door for you as a lord to battle one on one with the best fighter of an oposing army in those cases where the oponent has greater numbers and defeating him grants you victory over said greater numbers, but with the risc of death and the end of that caracters run.