"The southlands of Eor are being despoiled. Merchants will no longer run their caravans on the main highway past the quiet village of Waycombe. The peasants are fleeing their lands, and all are demanding protection from the powerful Count of Eor. The goodly count has sent a troop of his trusted fighters to exterminate the brigands believed responsible for these outrages, but weeks have passed, and still there is no word from this force.
Now John Brunis, Count of Eor, has turned to you for aid. After taking counsel with the High Priest of Eor, he believes that a small party of cunning, bold adventurers may succeed where armed might has failed. You find yourselves faced with many mysteries!
Why has robbery suddenly erupted in the peaceful southlands? How could mere brigands be as powerful as the foes described to you by their numerous victims? Is this really mere robbery? Or is there some truth to the rumors, told only in hushed whispers, about the beginnings of a hideous plot being hatched by an ancient, vile, and evil foe of all mankind?"
Eor is beset by marauders and lizardmen of a boldness not seen in years. Hired by the Count of Eor, the party is tasked with tracing the source of these foes and eliminating them for the safety of the realm.
After a set piece combat in Count Brunis's castle, the party must trek across Eor's wilderness, eventually coming to the Great Southern Swamp beyond the village of Waycombe. With further exploration they can locate the Ancient Temple which serves as the tomb and stronghold of Sakathas, the vampiric LIZARD KING!
Correction, should be medium, not low, my apologies.
Low per https://www.reddit.com/r/AdventureLookup/comments/6tjaug/matts_guidelines_for_entries_fieldbyfield/
Please add: TSR 9055, From 1982 to the end of your description.