Bridges
 

how bout a bridge making tool, it would take logs and cloth-for ropes. it would be like the fortifcation system, like 10 logs for a small bridge 20 for a big one, it would have constitution it cannot be destroyed if u attack it, it would eventually fall down

...most kingdoms...dont..require..bridges?

Zormite could use it around the middle under the castle

Bridges would also be nice on the main island, as in going from Harmonia to Bogenera, and going to Avalonia from Hirathia by the southern route.

Only problem would be too many briges made by idiots to block the water.... No boat would ever get anywhere

Well, I'm not all for the idea of making bridges in-game, but I think a few bridges would be nice additions on Graal Island.

They'd be explodable...thus boats could clear bridges.
The risk is that people would want to, and would, connect their Tax/Market Island to their Main Island. This would have a number of unpleasant side effects - quicker ways to assault kingdom islands, it would become way too easy for players to go to their kingdom homes...