From Pathfinder #173: Doorway to the Red Star, which isn't enabled.

Entropy Choir

COMPLEX HAZARD 15

Stealth +33 Performance +33 (master); creatures in the area automatically notice the eerily swaying shadows

Description A choir of ghostly shadows fill the benches in this room, chanting a haunting and unearthly melody.

Disable DC 40 Religion (master) to exorcise the spirits and break the power binding them into a single entity, or DC 35 Performance (expert) to counter the choir and nullify the destructive elements of its song

AC 36; Fort +23, Ref +25, Will +29

Hardness 24, HP 90 (BT 45); Immunities critical hits, void, precision

Call to Nothingness (auditory, divine, mental, sonic)

Trigger A living creature moves more than 10 feet into area A3

Effect The eerie call of the entropy choir saps the will of living creatures. A living creature who fails a DC 36 Will save becomes Slowed 1 as long as they remain in area A3. The entropy choir then rolls initiative.

Routine

(3 actions; auditory, divine, evocation, sonic) The choir continues to sing its grim dirge every round until it is disabled or destroyed. If there are any non‑slowed living creatures in area A3 when its turn starts, it first uses Call to Nothingness as a single action.

It uses its remaining actions (or all three actions if there are slowed living creatures in the room already) to focus soul‑shattering choruses onto individual targets.

The choir can target any living creature in area A3 with an action, but never more than once per round per creature. It prefers to attack slowed creatures over all others, but it targets non‑slowed creatures if they're the only viable targets. A targeted creature must attempt a DC 36 Fortitude save.

Critical Success The target is unaffected.

Success The target takes 5d6 sonic damage.

Failure The target takes 10d6 sonic damage.

Critical Failure The target takes 15d6 sonic damage and increases their Drained condition by 1, to a maximum of drained 4.

Reset The entropy choir resets automatically after 24 hours, even if it has been disabled or destroyed. It fades away forever once Dwandek and other members of the cult to which it sings its praises are destroyed.

Pathfinder #173: Doorway to the Red StarOGL