From Pathfinder #181: Zombie Feast, which isn't enabled.

Sickle Blade

HAZARD 3

Stealth +10 (trained)

Description A skeletal arm holding a sickle is concealed in the ceiling and connected to a mechanism in the sliding door below it.

Disable DC 20 Thievery (trained) on the door frame or ceiling groove, or Interact to operate a lever on the opposite side of the door (in areas D2 and D4, respectively)

AC 19; Fort +12, Ref +4

Hardness 11, HP 44 (BT 22); Immunities critical hits, precision

Sickle

Trigger A creature attempts to open the door

Effect A skeletal arm swings a sickle from the ceiling, making a Strike against the triggering creature.

Melee Sickle +16, Damage 2d12+11 slashing

Reset The trap resets after 15 minutes. Additionally, a creature can manually Interact with the lever on the opposite side of the door to reset the trap.

Pathfinder #181: Zombie FeastOGL