Iuz the Evil (AD&D/Greyhawk Module WGR5)

This sourcebook details the many lands Iuz controls; his dark priests and their magic; Iuz's fiendish allies from the Abyss; his marauding humanoid armies and raiders; and much, much more. These are lands of ineffable evil, a beacon for adventurers seeking glory within their perilous borders. Servants of good, prepare your weapons and ready your spells, for there are no challenges greater in all the Flanaess than those of the Lands of Iuz.