A One-Round Living Greyhawk Dyvers Regional Adventure
From the introduction:
The armies of Blackthorn march toward the city. It is foretold that they will infiltrate Dyvers through the sewers. Only members of the constabulary and the Dyvers Vermin & Pest Contractors may lawfully enter, but gelatinous cubes, wererats, a stone golem, and a lich all call the sewers home. Things are afoot — underfoot.
A Dyvers regional adventure of investigation and dungeoneering set in the City of Dyvers for characters level 1 - 15.