[quote=Asura]
Natural defenses will always be a problem in nation RPs. The people who take up on mountainous terrain will always be harder to invade, people in cold terrain will always be harder to siege. I suppose it all balances out though. If you're in a frozen tundra, food shortages would probably plague you. Same with mountains because of a lack of farm land. The poison grass would probably work the same. Can't have livestock, but your enemies can't feed their horses.Just my two cents.
[/quote]

But he's saying you cant cross it or it will kill you. Logically, for this reason you couldn't settle the thing, if it is all surrounded by the grass, as the wind would pick up and kill the settlers.