pf2e.fyi
From Pathfinder #209: Destroyer's Doom, which isn't enabled.

Trampling Livestock

HAZARD 9
HAUNT
Stealth +10 (trained)
Description Several ghostly mammoths arise from the floorboards, pawing at the ground in terror before stampeding toward the door.
Disable DC 28 Religion to exorcise the animals' spirits, or DC 26 Nature or DC 24 Stabling Lore to soothe them
Sudden Stampede (occult)
Trigger The door to the stable opens
Effect The mammoth spirits activate in panic, materializing into physical forms as they stampede toward the door to escape. All creatures standing within 20 feet of the door take 4d10+26 force damage (DC 28 basic Reflex save).
Reset 1 day
Pathfinder #209: Destroyer's DoomORC