Clow Cards are magical cards created by the sorcerer Clow Reed in the anime and manga series Cardcaptor Sakura. Each card possesses unique powers and abilities, often represented by different creatures or elements. The cards are used by the main character, Sakura Kinomoto, to capture and control the magical entities they represent. In the story, Sakura discovers the cards in a mysterious book and accidentally releases them. To prevent chaos, she must capture each card using her own magical abilities. As she collects the cards, she learns valuable lessons about friendship, responsibility, and the importance of understanding one's powers.