Sawmill - the idea of creating an open and offensive economic building for Isengard is good, but not particularly effective. For example: At the early stage of the game, the player is already building sawmills, and at least two (already depends on the card / number of players and so on.), But let's say that this is a 1x1 or 2x2 card. It is likely that by the time the player has access to the ability of the sawmill, all the slots of the settlements will already be occupied, and he will choose the convenient and necessary place for him. But by the middle of the game and further on, the map may end up with wood, and the call of the sawmill will simply be useless, or almost useless. For example, the same problem was with the past ability that was passive, at first the player received +100% of resources and after the middle of the game when just the trees ended the player did not receive any bonus. So maybe you should reconsider this ability?