Create a new Dynastic rule, titled “Prophecies”, reading as follows:

“Once per Season, (but not on Sundays, not if the weather is Rain, and not if the Sky has not yet been examined in the current Season) each Townsperson may make a Prophecy.
A Prophecy is a Story post in which an event is foreseen to happen, based on the state of the Sky at time of posting.
Its title must start with the tag “[Prophecy]”.
It must include a detailed explanation as to how the current conditions of the Sky can be interpreted in that way.

(for example, a legal Prophecy could read:
“Behold the Greater Triangle shining brightly on the Left, this is a clear sign that a Townsperson with that Constellation in their birthsign is destined to do something.
And see, there! the Eel next to the Toad, an omen of failure!
I foresee that, before the end of Summer, a Townsperson with the Greater Triangle in their birthsign will have one of their Proposals Failed.”)

Prophecies may not mention Townpeople’s names nor Calls for Judgment.

—Fulfillment
Should the event foreseen in a Prophecy actually take place before the first change of Season after the time of its posting, and if the Prophecy is less than 10 days old, any Townsperson may Comment on it that “The Prophecy is Fulfilled”, thus making it a Fulfilled Prophecy.
It is recommended that a list of Fulfilled Prophecies is kept somewhere in the wiki.