A One-Round Living Greyhawk Theocracy of the Pale Regional Adventure
From the introduction:
The Troll King sits on his throne in the Troll Fens. His machinations are slowly coming to light; with this knowledge comes the need to confront the fiend in his own realm. To this end, the Pale Patrol has asked mercenary adventurers and loyal Pholtans alike to journey into the Fens and determine how large a threat is left.
An adventure into the ice-covered Troll Fens in the dead of winter for characters of [level] 2 to 12.
Part 2 of Winter Stalks the Pale.
A 1-page PDF Errata was issued for this adventure.