Like a player character’s stat block, a kingdom’s stat block continues to evolve and grow as the kingdom expands, gathers more resources, purchases upgrades, and suffers defeats and setbacks. As the kingdom grows, the PCs will need to deal with a host of situations, all of which can further influence the kingdom’s stat block. A kingdom’s growth occurs during four phases, which represent a month in total. When the PCs establish a kingdom, you should pick a day of each month to resolve that kingdom’s growth and fortunes—it’s best to set this as the last day of each month, so that any accomplishments the PCs have made during that month can impact that month’s growth.
One thing to decide early on is who makes kingdom rolls. The obvious choice is for the Ruler to roll the dice, as this adds a feeling of command to that player’s role. You can also assign each roll to a specific leader—for example, the Treasurer might make Economy checks and the Warden may wish to make all checks having to do with events under her command. Ultimately, since a kingdom is shared by all the players, it doesn’t matter who makes the kingdom’s Economy, Loyalty, and Stability checks, but assigning them can be fun nonetheless.