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. Although their king rarely works because his loyal boy Ratboy does all the dirty work for him. nobody wants to enter or leave their room, because it modifies itself depending on his surrounding. It is one of these so called "intelligent" castle and even knows how to speak to you.