Mosquitoes!!

Once you defeated Druegar (first boss in the shrine) go back to the ruins and if you go north east again, a little further up from the place where the rock monsters are and you can see Mosquitoes flying around in the air. Try to get close to them and they will slowly but surely follow you. Slowly walk down to get to the village and make sure they are following. Just before you go across to the Mosquitoes are there, right next to you. When you cross over you should get a message saying something about the Mosquitoes not being in pursuit no more. Then you will get you well deserve achievement.