What's the use of having two monarchs in the kingdom?

Give him the principal and you can pay the interest. After the main city is upgraded to level 4, the bank will be opened and a housekeeper will appear. You can deposit money in it, and interest will be generated the next day. If you give him the principal, you can repay the interest. You will save the money that falls on the ground, and he will give you money when you are near him. Two Kings of the Kingdom is an upgraded version of this game series, based on challenging and famous micro-strategy experience.