A One-Round Living Greyhawk Bissel Regional Adventure
From the introduction:
A patrol of the Fetid Fens a few months back revealed an ancient Flan village that was tainted by a cult of Kyuss ages ago. To ensure the evil was vanquished, the local baron, Theoder Cullen, ordered regular patrols of the area. The latest patrol never returned from the fens. A group of heroes sent by the baron to investigate the disappearance are also missing. Will you investigate the fens and bring back any survivors?
part One of the Fetid Fens series.
An adventure for characters levels 3 - 10.