From reading the rules, I'd say that when you purchase a grey card, some cards are just like those found in the yellow, brown, blue & orange decks. I'd guess they show the same symbols and allow the same actions.

The dice card is kept, and when you are the active player you could spend the card to set the dice values to whatever you wanted rather than rolling them to determine how far the king moves.

Thank you Steve. That would seem to make sense and is close to what I thought the rules meant. They are written in a sort of shorthand that makes understanding them a bit tricky. What do you think of the game based upon just reading the rules?

Dear Neal,
I confirm: grey actions consists in purchasing grey cards. Some of the grey cards are identical to the yellow or blue cards. In the rules also brown and spice cards are mentioned, the original version of the game provided in fact the deck had all kinds of cards but the current deck is differently composed and there is no brown and orange card inside.
Dice are used as suggested by Steve. When you are in turn you can decide how many steps the steward moves, from 2 to 12 instead of rolling dice.
ciao
leo colovini

Leo, welcome to boardgamegeek.

While I have your attention, could you comment on the questions raised here: http://www.boardgamegeek.com/thread/326213 ?

Thanks!