Plants

[-Axel-]

I think it would be a cool idea (If its not be talked about before) if you were able to grow different plants. You could use then as barriers (Not like blocking the mines and stuff, for kingdoms o_o), and just to add color to a area.

And maybe each kingdom could have a special flower, or plant of some type that is useful and they could trade with other kingdoms. (That is, if they are still peaceful with that kingdom )