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.
A wizard has cast a slow action freezing spell upon a PC. The air gets colder around the PC by one degree a day. If the spell is not broken within a few weeks the PC will freeze and die.