The Clow Cards? There's nineteen of them. None that could be used for tracking though. The closest might be Shadow, but that's still not quite what we need. They can all do different things, really.

[She pulls one out to show him. It's about the appearance and size of a tarot card, as she shows him Shadow.]

There's Shadow, the Shield, the Fly, the Jump, the Sword, Woody, Firey, Earthy, Windy, Watery, Flower, the Dark, the Light, The Erase, the Illusion, the Maze, the Thunder, the Mirror and the Glow.