How would I make a terrain(a new one that I put in already) be "unclaimable".(i.e. no Civ's borders can extend to this terrain)? Also seeing as how this could cause city building issues(like being surrounded by unclaimable terrain) how would I modify it so that this terrain shows up less than others when the map is generated? I like the randomness of maps so I dont want to just put in a bunch of custom maps that I'd be forced to play on so Civ's wont get stuck with a bunch of this new terrain. Any answers would be much appreciated. Thanks in advance.