Hi Jherec, Here is the skill flag for changing terrain. .replace_terrain=, takes oldTerrain|newTerrain and causes the skill to replace the old terrain type with the new one. You can specify multiple replacement groups by separating them with commas. Such as: grass|burnt_grass,tree|burnt_tree So, if you wanted to be able to "destroy" a bridge, you could have a unit possess a skill that can change a bridge terrain into whatever it is crossing over, for example water. This then can put the terrain you want in, and give the range bonus you would like. A structure would not be as good as simply changing the terrain, in my opinion. I think you should consider Craig's and Carlos's multiplayer maps, and dig around in the files and play the maps to see what they did. al