A one-Round Living Greyhawk Core Special Adventure
From the introduction:
Sterich is once more in need of heroes to stand between it and the rising tide of darkness. Humanoid and giant raids boiling out of the Crystalmist Mountains are again increasing in frequency and boldness. Rumors swirling thickly through Istivin’s shadowed streets speak of the malevolent Spider Queen and her resurgent interest in the sunlit lands of the Flanaess.
A one-round core special adventure set in the March of Sterich and the Crystalmist Mountains for characters level 1 - 11.