Add a rule titled “The Codex”:

Some rules may be Encrypted for the duration of this game. Any such Encrypted rule is to be listed as ciphertext as a separate clause at the end of this rule. Any game action taken under an Encrypted rule must be accompanied by a post to the front page stating that an Encrypted rule was used, although neither the Encrypted rule or the plaintext itself need be cited. The Abbot is responsible for policing the legality of such plays, and any Monk making a play by an Encrypted rule is strongly advised to contact the Abbot to inform em of the play.

For the purposes of adding, editing, or removing ciphertext, the Abbot may alter this rule at any time, provided that e gives notice on the front page that an alteration has been made.

Any encryption that we use should be breakable by hand—that is, I don’t intend that we use 256-bit AES on any of these. Different ciphers are certainly possible—some should be easy, while others may be quite fiendish. As I am responsible for policing any such plays, if anybody wants to add an Encrypted rule by proposal, better e-mail me the cipher first.