The fly card is a great card that Sakura uses to get around. Sakura found it in episode 1 when she opened the clow book. Fly was the very first card capture done by Sakura. Fly, in creature form is a giant bird that can create some serious wind damage by flapping its wings.

When used, Fly enchants Sakura's sealing wand and wings grow on the head of it. Sakura rides the wand like a witch rides a broomstick in the sky.