Source: Pathfinder #11.

XP 6,400
Notice Perception DC 25 (to hear the faint sounds of battle);
hp 18 Trigger proximity (2 round onset delay); Reset automatic (10 minutes)

As the storm of allip-like spirits churn into an overwhelming vortex, all creatures in the room must make a DC 25 Will save to avoid suffering 2d6 points of Wisdom damage, similar to having been touched by touch of idiocy.