Suicide Compulsion CR 4
Source Pathfinder #2.
Notice Perception DC 20 (to notice the appearance of a dagger on the desk that, an instant before, was not there); hp 8
Trigger proximity; Reset automatic (24 hours)
The haunted character must make a DC 15 Will save. Failure indicates he moves over to the desk and attempts a coup de grace action on himself with the jagged length of wood, dealing 2d4 (plus twice his Strength modifer) points of damage on himself.
He must make a Fortitude save (DC 10 + the damage dealt) to avoid being slain by this suicide attempt. If anyone tries to prevent the attempt, the haunted character makes a single attack against that person with the “dagger.” If he hits, the supernaturally guided strike automatically scores a critical hit. After this attack, the “dagger” turns back into wood.