pf2e.fyi
From Pathfinder #214: The Broken Palace, which isn't enabled.

Collapsing Cell

HAZARD 4
Stealth +12 (expert)
Description A section of ceiling and iron cell bars collapse inward.

Disable DC 22 Thievery (trained) or DC 25 Crafting (trained) to use a loose iron bar to shore up the ceiling.


Collapse
Trigger A Medium or larger creature moves through the cell at a faster pace than simply Stepping, or more than one Medium or larger creature enter the cell at the same time

Effect The ceiling and walls of the cell collapse, creating a thunderous roar. All creatures in the cell must attempt a DC 25 Reflex save; the cell then becomes greater difficult terrain that can be passed through safely.

Critical Success The creature is unaffected.

Success The creature takes 1d10+6 bludgeoning damage.

Failure The creature takes 2d10+13 bludgeoning damage and is Immobilized by fallen rubble (Escape).

Critical Failure The creature is buried in the rubble. They take 3d10+19 bludgeoning damage and are Restrained (Escape). Until they escape, the creature must hold their breath or risk suffocating.

Effect: Remaining Air

Pathfinder #214: The Broken PalaceORC