From Pathfinder Adventure: The Fall of Plaguestone, which isn't enabled.

Ice Fall Trap

HAZARD 4

Stealth +12 (trained)

Description Compartments in the ceiling are rigged to drop a freezing alchemical liquid into the entire room if the door is opened without using the key.

Disable DC 20 Thievery (trained) on the door allows it to be opened without springing the trap.

AC 20; Fort +11, Ref +7

Hardness 8, HP 44 (BT 22); Immunities critical hits, precision

Ice Fall

Trigger The door is attacked or opened without using the key.

Effect A freezing alchemical slurry is dumped into the room, dealing 4d6 cold damage to everyone in the area (DC 20 basic Reflex save).

Pathfinder Adventure: The Fall of PlaguestoneOGL