A One-Round Living Greyhawk Tuflik, Fals, and Velverdyva Meta-Regional Adventure set in Zeif
From the introduction:
The army of Ket has assembled at the behest of the Grand Mufti of the True Faith and marches on Ekbir to retrieve a lost pair of artifacts. Tusmit is split in terms of loyalty and Zeif stands alone in the Baklunish West, with no declared loyalties. An opportunity has arisen to possibly influence their stance, or perhaps simply do good in a region where something unnatural has taken hold.
An adventure with some investigation for levels 4 - 15 and part of the Unity and Discord Series.