This is a silly idea, but I figured it’d spice things up and keep players on their toes~
River. Only living things can swim across rivers. Cannons and mortars must go the long way, whatever may wait for them~ Paladins, too… Their armor is too heavy, they can’t swim. Units will cross the river naturally unless the king screams them towards the other path.
Ledge. A ledge is kinda like the ledges in Pokemon. You can jump down, but you can’t jump up.
Laser beam. All units are allowed to pass through it if your king commands them to, but every unit that passes through it, incurs damage (including the defending units).
Now, how should these be paid for? Should there be a new allowance for them, or should they be taken out of something already existing? I think they should be taken out of something already existing. Keep in mind, these would give a huge advantage to the defender otherwise! Imagine starting a raid, and instead of being met with 3 monsters, you’re met with 6. Not fun for the attacker. So it’s needs to be taken out of something else in order to keep it from being OP.
But then /that/ raises the question of, what do we take it out of? I would suggest taking it out of the Tile Amount. It’s terrain, so it only makes sense for it to come out of the terrain allowance. Also, shorter path = less waves, which might help balance it out.
Not an idea I necessarily feel the need for, but it would certainly add a new element to the strategy. Like, seriously, this is at the middle of my List of Priorities, at best.