Zendo comes with 40 rule cards that generate over 200 unique rules. That'll keep players guessing for a long while, but when you're ready for more, here's a set of 10 all-new secret rule cards, one rated as Easy, four as Medium, and five as Difficult. These cards will generate 45 different rules, but don`t let anyone read these cards until someone is ready to moderate a session. The fun is in figuring it out, so please keep the secret rules secret!