Ship version of the Clan Caste
I think there should be a ship that you can request troops for, or put your own troops in that sails up to the beach of the village you want to attack then releases its troops.
Here's the stats:
Lvl 1:
200 000 gold to build
20 housing space
Lvl 2:
500 00 gold to upgrade
30 housing space
Lvl 3:
750 000 gold to upgrade
40 housing space
Lvl 4:
1.25 million gold to upgrade
50 housing space
I got this idea from the Viking troop idea in new troops ideas sub forum so some credit to ShadowyWhisper for giving me this idea.
Underwater Mine:
A mine that you can place in the water that floats up and does splash damage to troops inside the ship.
Credit to C4Designs on this one, its a great idea and I wanted to add it here!