It is based on the "sea" maps that I created last time.
Just to confirm once again - playing with water, jumping from boat to boat is a real pain. I suggest you try it yourself.
To get from one town to another, you will have to get on a boat twice and get off it.
On the first map, you get a hero with 10 knowledge and 10 magic power. Then you develop him yourself, to three levels on each map. I advise you to learn water magic and two spells - "summon boat" and "destroy boat". It will come in handy if needed.
The fourth map = the first map
The fifth map = the second map
The sixth map = the third map
There are a total of 7 maps in the campaign.