From Pathfinder #179: Cradle of Quartz, which isn't enabled.

Explosive Steam Trap

COMPLEX HAZARD 7

Stealth +10 (trained) to find the desk switch; DC 28 Perception (expert) to find the trapdoor and charge

Description A black‑powder charge fastened to a trapdoor (marked with a "T" on the map) blows a hole in a steam tunnel, filling the room with superheated steam.

Disable DC 18 Thievery (trained) to disarm the desk switch; DC 28 Thievery (expert) to disarm the trapdoor charge

AC 25; Fort +18, Ref +15

Hardness 8, HP 50 (BT 25); Immunities critical hits, precision

Explosive Charge

Trigger The desk switch is pressed or the trapdoor is opened

Effect The charge on the door explodes. All creatures within 10 feet take 2d10+6 fire damage and 1d10+3 piercing damage, and 1d6 bleed (DC 22 basic Reflex). The room is filled with steam, making all creatures within the room Concealed. The trap then rolls initiative.

Routine

(1 action) The trapdoor emits a jet of superheated steam. Each creature in the room must attempt a DC 28 Fortitude save.

Critical Success The creature is unaffected.

Success The creature takes 1d10+3 fire damage.

Failure The creature takes 2d10+6 fire damage and is Blinded for 1 round.

Critical Failure The creature takes 2d10+6 fire damage, is Fatigued, and is blinded for 1 round.

Pathfinder #179: Cradle of QuartzOGL