Source Pathfinder #2.
Notice Perception DC 15 (to notice the scarf moving on its own); hp 10
Trigger proximity; Reset automatic (24 hours)
A ghostly scarf unerringly wraps around the haunted character’s throat. The victim must make a DC 16 Will save to avoid being paralyzed with fear as a ghostly image manifests before him and appears to be using the scarf to choke him to death; at the same moment, the haunted character loses sense of himself. He must then make a DC 16 Fortitude save—success indicates he merely takes 3d6 points of nonlethal damage, but failure indicates he is immediately reduced to -8 hit points and is dying.