These places are accursed morasses of depravity, nexuses of lingering hate and festering evil that bode ill for the pure-hearted who trespass upon them.
A well of evil is typically a single room, cave, or structure, though it can expand to fill an area with a radius of up to 2d4 × 10 feet. Good-aligned creatures can feel the powerful evil presence tainting a well of evil, and such creatures that approach within 30 feet must succeed at a DC 15 Will save or become sickened and refuse to enter the location for 1 hour. A successful Will save negates these unfortunate effects, but if the creature actually enters the location, it becomes sickened with no save. Within a well of evil, the DC to resist negative channeled energy increases by 2, and good-aligned creatures take a –2 penalty on saving throws against curses, corruptions, madnesses, spells with the evil descriptor, and the effects of haunts. Haunts that lurk within wells of evil also gain a +4 bonus on their Initiative checks and to Perception check DCs to notice them.
Pathfinder Roleplaying Game Horror Adventures © 2016, Paizo Inc.; Authors: John Bennett, Clinton J. Boomer, Logan Bonner, Robert Brookes, Jason Bulmahn, Ross Byers, Jim Groves, Steven Helt, Thurston Hillman, Eric Hindley, Brandon Hodge, Mikko Kallio, Jason Nelson, Tom Phillips, Stephen Radney-MacFarland, Alistair Rigg, Alex Riggs, David N. Ross, F. Wesley Schneider, David Schwartz, Mark Seifter, and Linda Zayas-Palmer.