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Hazards

Cave-In

Level 4

commonEnvironmental

A precarious tunnel ceiling waiting for the wrong footfall to bring the whole passage down.

Stealth DC 22 (trained)

Disable DC 25 Survival (trained) to prop up the tunnel ceiling without triggering a collapse

Collapse [Reaction]

Level 4 · Complexity Simple

Stealth DC 22 (trained)

Disable Survival DC 25 (trained) — to prop up the tunnel ceiling without triggering a collapse

AC 21

HP 46 · Hardness 13

Immunities critical hits, object immunities, precision damage

Trigger A creature moves into the unstable tunnel

Effect The tunnel collapses in a cave-in that deals 4d8+10 bludgeoning damage to the triggering creature and all creatures in area A2 (DC 21 basic Reflex save). On a failed save, the triggering creature is immobilized (Escape DC 21). This collapse fully blocks the tunnel (area A2), making it impassable.

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