It seems to me that the english translation of two of the action cards is misleading. Maybe this is an old issue, but I only found out about this "the hard way". And I wonder if the translation is wrong, or there is a bug in the game?
1. It says on one card "Move any empty tower block directly on the board to another empty space on the board..." However, this card can be used to move blocks that are not sitting on the board, but on top of other blocks.
2. On another card, it says "Move one of your knights past one other knight by jumping over it..." Apparently, the "other knight" must in fact be an opponent's knight.