Extinction Curse Player's Guide

From the introduction: An evil hungers beneath the earth. This ancient enemy seeks to undo Aroden’s work from millennia ago and bring desolation to the Isle of Kortos. The heroes destined to confront this enemy have humble beginnings, working as members of a novice circus troupe on the Isle of Erran, just off the north coast of the Isle of Kortos. These humble heroes are fated for much more than the circus, however, and with skill and luck might save the entire region from the extinction curse!