A One-Round Living Greyhawk Theocracy of the Pale Regional Adventure
From the introduction:
Idle days along the Yol River turn to alarm when rangers report coming across the paths of ogre bands moving fast through the Phostwood. The faithful of the Pale seek shelter in their homes, but malice travels on thundering drumbeats from across the river, deep within the ghostly forest.
A Pale regional adventure for the noble and the savage of [levels] 4 - 12.