From the introduction: The Cairn of Recall is a 5th to 7th level adventure designed for the Dungeons and Dragons Open Gaming License D20 series 3.5 system. It is easily modified to be used with a number of different gaming systems with limited modifications to the creatures or the settings. The adventure takes place on the world of Centrifuge and this can easily be modified to take place on the peripheral of any major kingdom. The adventure is designed to compliment but stand apart from the greater adventure series Revenge of the Dracolich.