I thought the ace can act as a high card or a low card in a straight. I find this to be correct. But on examination of wikipedia, it tells me that the ace does not wrap around in a straight, i.e. cannot be both high card & low card at once.
(I remembered a championship-winning hand mentioned on TV, 5 4 3 2 A straight flush)
http://en.wikipedia.org/wiki/Poker_hands#Straight
For example, 5 4 3 2 A and A K Q J 10 are valid straights, but 3 2 A K Q is not.
Sometimes a wraparound straight is used as a valid hand, but this is nonstandard.
http://en.wikipedia.org/wiki/Non_standard_poker_hands
I would intuitively think that the 0 is like the ace, acting as a 10 normally, but if needed could act as a 0 instead.
So, for clarification, are you going to use the 0 as exclusively 10 or let it act as a 0 in a straight, like an ace would? (i.e. which ranks do you cut out, Q K A or J Q K?)
I suppose that, to make older creatures better, the nonexistent extra digits could act as a wildcard. (i.e. dark ID 1000 would be a five-of-a-kind)