From Pathfinder #195: Heavy is the Crown, which isn't enabled.

Explosive Entrance

HAZARD 9

Stealth +23 (master)

Description An alchemical bombs explodes when the rubble is shifted, filling the hall with flame.

Disable DC 30 Crafting (master) to nullify the bomb's alchemical components or DC 28 Thievery (master) to disable the bomb

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Trigger A creature in contact with the ground travels down this hall

Effect The bombs explodes, dealing 6d8+12 fire damage to the triggering creature and all creatures within 20 feet (DC 32 basic Reflex save). Additionally, if the triggering creature fails their saving throw, they take 1d8 persistent fire damage.

Pathfinder #195: Heavy is the CrownOGL