This medieval batman villain is quite harmless, and will only stop you to offer you a competition. The wager is 50 Groschen on both sides, so a victory or loss can have you gain 100 Groschen or set you back that amount. If you accept, you'll have a moderately challenging fight until either of you surrenders. Though dangerous looking, the Mercenary is a friendly NPC that is bored while waiting for their next job, and will challenge you to honorable combat to pass the time.
Subsequent duels will also reward you with more brigandine - making dueling him a lucrative encounter. This knight will offer a challenge - if you beat him, you can earn an expensive piece of armor, the Dyed Milanese Brigandine, or you will have to pay up if you lose.
You can decline, or fight until either of you submits. The other Knight, unlike the Faint-hearted Knight, is a much tougher opponent, but like the former, will challenge you to honorable combat.
