I have to apologize first, because I just don't have a secret card ID. But there is only one overlay secred card which is obliquely on the map, for this scenario. Does this overlay card really break the wall on other tiles? because this card will do it right in the middle of the wall on the adjacent tile and makes the game much easier (read the faster ending), because it disrupts the puzzle of how to rotate tiles. I wonder if that's the intention. Thanks.