Add a new dynastic rule called “Copying” and give it the following text

As a daily action, a Player (the Challenger) may spend two eyes to Challenge another Player (The Challengee) by making a story post to the blog with the subject “Challenge: [Player name] [hint 1] [hint 2]” where [Player name] is the name of the Challengee, and [hint 1] and [hint 2] are two two different Hints of the same type (i.e. both letters or both numbers). The Challenger must have both of the mentioned Hints in order to make the post.

Within 72 hours of the post being made, the Challengee may respond by either adding [hint 1] or [hint 2] (or both) to their list of hints (provided it isn’t already there).
If, after 72 hours of the post being made, neither [hint 1] or [hint 2] are in the Challengee’s list of hints, any player may add both [hint 1] and [hint 2] to the Challengees Hints.