The Castle at the Edge of the World
Book of Counted Hours
A druid only divination tool.
By studying this book for a week and using its many charts to perform numerous celestial calculations a druid is able to guide a group toward a goal. It does not matter if the goal is as simple as where and when to plant crops, or as complex as negotiating a treaty between nations.
The power of the book is such that anyone working toward the goal, is given a +5 circumstance bonus toward skill checks used to achieve that goal. (checks that qualify for the bonus are at the GM’s discretion). To receive the bonus the person must be guided by the druid himself or someone under the druid’s guidance.