From Pathfinder #156: The Apocalypse Prophet, which isn't enabled.

Thief's Trap

HAZARD 20

Stealth +40 (master) to notice that the hairline cracks on the passage walls actually form runes.

Description Nearly imperceptible runes set off an explosion at the point a thief is most unable to receive aid.

Disable DC 45 Thievery (master) or Dispel Magic (10th rank, counteract DC 50) to counteract the runes

Explosion

Trigger A creature crosses a rune

Effect The runes unleash a gout of fire roaring up the chute. Anyone in the chute and within 5 feet of its openings is dealt 8d10+44 fire damage (DC 42 basic Reflex save).

Immediately thereafter, the runes emanate a 4th-rank Silence effect for 1 minute, so anyone injured in the chute can't call out for help.

Reset The trap resets in 1 minute.

Pathfinder #156: The Apocalypse ProphetOGL