A One-Round Living Greyhawk County of Urnst Regional Adventure
From the introduction:
A mysterious plague holds the fate of two towns in the balance. The call has gone out for help, but will it be in time? This adventure is not recommended for Asherati characters. Part one of the Legacy of the Leviathan series. A one-round County of Urnst adventure set in the Archbarony of Dyvarna for characters levels 1 - 15.
This adventure includes an additional, optional encounter for [character levels] 8 - 12 only.