From Pathfinder Adventure Path: Hellbreakers, which isn't enabled.

Cannibalization of the Priestess

COMPLEX HAZARD 9

Stealth +20 (expert)

Description Spectral undead converge on any living creatures to rip into and devour them.

Disable DC 28 Athletics to push past or run away, or DC 28 Occultism or DC 28 Religion (expert) to exorcise the haunt

Swarm

Trigger A living creature enters the square of the town center

Effect All creatures within area M2 take 3d10 slashing damage (DC 28 basic Reflex save). The haunt then rolls initiative.

Routine (1 action) The haunt converges upon all creatures currently bleeding in area M2. The targeted creatures must attempt a DC 28 basic Fortitude save against 3d6 spirit plus 3d6 void damage from the spirits pulling and gnawing on their souls. On a critical failure, the creature also suffers 2d6 persistent bleed damage.

Reset The haunt deactivates 1 minute after there are no bleeding creatures left in M2. If disabled, it resets after 1 day. Destroying Illcayna is the only way to permanently destroy this haunt.

Pathfinder Adventure Path: HellbreakersORC