If you feel too much entertained, he will first allow you to ask for one wish. I have to warn you : it has to be a passive wish. Whenever the king feels like it, he will spend a lot of money to fulfill your wish. And when that is done, 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. Officially, nobody does, because everyone is under jurisdiction of King #9.