From Pathfinder Kingmaker, which isn't enabled.

Rigged Climbing Loops

HAZARD 0

Stealth +10

Description Loose handholds rip away from the walls to drop unsuspecting climbers into the chasm below.

Disable DC 16 Crafting (trained) or DC 16 Thievery to anchor the climbing loops more securely

Tear Free

Trigger A creature climbs across the chasm without knowing which of the loops are rigged

Effect The loops rip free, dropping the climber 20 feet into the chasm below and dealing 10 bludgeoning damage. The falling creature can use the Grab an Edge reaction to avoid falling if it succeeds at a DC 11 flat check; failure indicates that the edge grabbed rips away as well.

Pathfinder KingmakerOGL