Make a distraction!

You take a moment to calm down and think ahead. Sure, you could get into Karl's tent and kill him, but the noise of your fight and his **** would almost certainly attract unwanted attention. And if the entire camp woke up, you'd be overwhelmed... You're pretty confident in your abilities, and think you could maybe take on 5 men at once, but 15... That might be a stretch. A fire would both draw the Magpies away, and make enough noise to crowd out the noises any fighting that might happen once you find him.

Sending a quick prayer to Lucretia, you dart from tent to tent, going as far away from the Karl's as you can. It leads you quite close to the entrance actually, and you take a look at the alternate way you could have entered the camp. Visible on the ground is a rope, tied into a lasso, with a trap mechanism rigged to it. Grimacing, you thank your lucky stars you decided to jump the palisade. Tripping that trap would not have gone well for you.

Keeping low, you skirt past another tent, and then wait for the sentry to pass by. Closing your eyes, you mutter a few holy words. Suddenly, a strange feeling shoots up your right arm, as if a thousand pins and needles are surging down to your fingertips. It's not unpleasant, but it feels incredibly strange. Glancing down, you see your entire hand is glowing, aflame with Lucretia's holy light. Without hesitating, you press your hand to each of the rear pegs of the tent, and watch as the flames take hold. They first burn the pegs that keep them down, and then snake up towards the fragile, flammable animal skin and the fat beneath it. You quickly douse your holy flames and swiftly make your way back the way you came. You have to pause once to let the sentry pass once again but soon enough, you see a dim light coming from the other end of the camp. And then shouting.

You don't hesitate. Quickly, you slink behind Karl's tent and unsheathe your blade. Taking a deep breath, you cut a long, vertical hole in it and burst through, sword at the ready. You're going to kill Karl and complete this quest!