This card (uk) is a status card that allows all uk prepared cards to be used as attrition cards. What does this mean? Since prepared cards can always be discarded for attrition costs, I assume it means that, with this status in play, they can be used to initiate attrition. But it must, presumably, mean cards that have no attrition symbols? So, do we assume that these cards are now considered to have one black attrition symbol?
In my opinion this card CAN be too powerful especially if played early on. Often 19154 is decided by attrition in the last 2-3 turns and this card can deplete the Central Powers to the point where 10+ VP can be deducted leading to an Entente victory.
Perhaps a 'cap' could be set to the number of cards overall or an antidote provided for the Entente? For example, the maximum attrition from other cards seems to be '5' if ... Theoretically this card could be worth '16'.