What is that card and whats are its effects?
Last time is used it but nothing happened.
You might be looking in the wrong area. It's outside the village walls. Screenshot by Lightshot If you use a second card, it will be right beside it. It means you can have 19 buildings instead of the usual 18. Often buildings have to be demolished to make way for other buildings, and this will save you from having to demolish one of them.
i see it now thanks
but it means tat building will not get def bonus from walls and etc.? as it is outside the village wall.
It will still get the same bonus as the other buildings. I think it was just easier to put them there than redo the village design.