there were 52 clow cards in the clow, clow read also created the Nothing card, this card was never in the clow book, also in episode 70 of Cardcaptor Sakura or Cardcaptors, Sakura Created, from her heart the nameless card. this card represented the love between Sakura and Li. in the final movie the nothing card and the nameless card went together and became the Hope card making 53 clow cards in all