The "
Stardeck" uses the fifth suit, the star, as both black and red, but I guess depending on the game, it might ruin the colour symmetry. Since five is a prime number, I figure each suit should have its own colour.
The six-suited one I want to get with the red crowns and black anchors maintains the symmetry with half still black and the other half still red. I heard of another deck with two new suits that are both blue.
The point is to make card games more interesting, and decks with more than four suits are hard to come by. Perhaps there's a reason for that, but I'd like to try it out before I knock it.
I think I'm always intrigued by the concept of "one more". The extra, unknown, and hidden. Like the eighth day of the week, the thirteenth disciple, the twenty-fifth (or thirteenth) hour. It could go the other way too, like the zeroth of anything.
That reminds me, I still want an analog clock or a watch with thirteen numbers on it - like the kind that Aeon from Castlevania Judgment has - though it could be weird to tell time on it... Maybe if the clock actually ran, it'd have to skip the 13 (or XIII)? Of course, noon wouldn't be as easy to read...