Within an ancient necropolis a pool of alien slime grasps the minds and bodies of the people of Exag with wispy tendrils of madness. Those transformed by its power invariably seek the crypt, but what fell power draws them there? Part two of the Seeds of Sehan campaign arc.
Even though this adventure "can" be used in "any setting", ... This adventure (and all three in the "Seeds of Sehan" three-part series) are set in the World of Greyhawk. Exag and the Yatil mountains (on maps and in text in all three) are part of the World of Greyhawk