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

Bloodletting Scythe Blade

HAZARD 6
MECHANICALTRAP
Stealth +16 (expert)
Description Two blades, each hidden in a 15-foot-long ceiling groove, are connected to a trip wire.
Disable DC 24 Thievery (trained) to disable each blade
AC 24; Fort +15, Ref +11
Hardness 13, HP 50 (BT 25); Immunities critical hits, precision
Falling Scythes (attack)
Trigger The trip wire is pulled or severed
Effect Both blades swing down, each one attacking all creatures under the ceiling grooves.
Melee Scythe +20 (deadly d12), Damage 2d12+4 slashing plus 1d6 bleed

No multiple attack penalty

Reset The trap resets after 15 minutes.
Pathfinder Society Special #3-99: Fate in the FutureOGL