The Gygaxian Gyre is a deep and vast place, and the Perrenian Necrohol is one of the zones of the dungeon that almost all explorers lucky enough to survive the Gyre proper are introduced to

What lies under the turf deep in the earth of that grassy mound? The PCs would very much like to know...

Inspired some years ago for a Kult/CoC Halloween game

Knowledge is Power. That is, he who makes the knowledge, wields the power.

The well was dug in years beyond memory. The locals still knew to stay away...