Fungus-Covered Sinkhole
HAZARD 6 +15 (or DC 0 if the fungus sheet covering the pit is destroyed)
A sheet of fungus covers a sinkhole that drops 30 down into area H7 below.
DC 19 Thievery to quickly cut a few key strands of fibrous fungus to cause the whole sheet to hang free
AC 10; Fort +11, Ref +11
HP 50 (BT 25); Immunities critical hits, precision; Weaknesses fire 10
Pitfall
A creature walks onto the sheet of fungus
The triggering creature falls 30 feet into area H7, taking 15 falling damage and an additional 6d6 piercing damage (DC 24 basic Reflex save) from the many stalagmites they land on. That creature can use the Grab an Edge reaction to avoid falling (DC 24).
Pathfinder #200: Seven Dooms for SandpointOGL