From Pathfinder Society Special #3-99: Fate in the Future, which isn't enabled.

Firespark Trap (3-4)

HAZARD 3

Stealth +11 (trained)

Description Magical motion sensors detect when a creature enters the chamber.

Disable DC 20 Thievery (trained) to disable the sensor without triggering them, or Dispel Magic (2nd rank; counteract DC 18) to counteract the sensors

Firespark (arcane, fire)

Trigger A living creature enters the chamber

Effect The rune detonates in a ball of flame that fills the chamber, dealing 4d6 fire damage to all creatures in the area (DC 21 basic Reflex save).

Pathfinder Society Special #3-99: Fate in the FutureOGL