They fight problems using philosophical weapons. They could be a threat for your people. But do not worry: the holy Text left by judge Panu gives complete instructions on how to neutralize them. First, move towards the nearest source of lava. Put on your special suit and dive into it. Make sure you don’t look like a penguin. Speaking of odd occurrences, They also made some smaller eruptions, for instance the famous "village hole" : it is a fountain in which everybody in this village has to bathe at least once a day.