The Tarot Cards aren't mimicking the Evil Piece or Brave Saint systems. Sorry if I made it seem that way. Basically, we make a bunch of blank cards, and then, when they're put into someone, they become a tarot card that fits their personality. As they're tailored to the personality of the holder, they enhance the speed/strength/durability/magic/etc, depending on what fits the person better. We're not limited to just the Major Arcanas in our "Peerage," because there is no peerage system. They just enhance people. While we will be giving cards to our "harem," we can give the cards to anyone.
Basically, it's the "Golden Ball" thing, but specialized for each recipient, rather than just being a generic boost. Also, they have a better design than a golden ball.
EDIT: Oh, and in case I hadn't made it clear:
[X] Tarot Cards