From the introduction: The Lost Shepherd is an AD&D adventure for characters of levels 2-4 (having a total of 8 levels). The adventure is set in spring in a mountainous region and involves the players confronting an obliviax. The local villagers believe that the obliviax is an insane magic user and will extrapolate this tale. The DM should be familiar with the obliviax and the spells that it possesses.