A One-Round Living Greyhawk Highfolk Regional Adventure
From the introduction:
Not too long ago, the foul magic of the Old One caused a portion of the Vesve to be exchanged with an ancient and abandoned Shieldmage's Tower. Strange allies inform you that the time has come to explore the crumbling ruins that should still reside in the Shield Lands, and to discover its untold secrets before the Dawn rises.
Part 3 of the Familiarity Breeds Contempt series.
A Highfolk regional adventure set in the Vesve Forest for characters levels 1-13.