Create a new dynastic rule, titled We Will All Fry Together When We Fry, with the following text:

There exists a time bomb with a timer.  The timer for the time bomb starts at 20, and goes down by 1 every two consecutive days there are no new proposals proposed, not counting during hiatuses.  When the timer gets to 0, all dynastic rules are repealed and a new metadynasty starts.  Every time a DoV passes, the timer goes up by 5.  The timer shall be tracked in story posts.

Set the timer of the time bomb to 20.