Ah, sorry. They're...the Clow Cards are magical cards made by Clow-san years ago. They're unique, combining both Eastern and Western magic together. There's nineteen of them in all, I have all of them. I can list them, show you sometime if you wanted. There are some offensive ones, some binding cards, some that are more support or defensive, it varies in their use.

[There's a pause then, as she takes a breath, worrying at her bottom lip as she continues.]

Once the cardcaptor has all the cards, that's when Yue-san, one of the two guardians, gives them a trial. Disaster is said to follow, if the one collecting the cards fails and isn't seen as being worthy.