Hidden Pit 0
Stealth: DC 18 (or 0 if the trapdoor is disabled or broken)
Description: A wooden trapdoor covers a pit that’s 10 feet square and 20 feet deep.
Disable: Thievery DC 12 to remove the trapdoor
AC: 10 Fort: 1 Ref: 1
Hardness: Trapdoor Hardness 3 Hp: Trapdoor HP 12 (BT 6) Immunities: critical hits, object immunities, precision damage
Pitfall Trigger: A creature walks onto the trapdoor Effect: The triggering creature falls in and takes falling damage (typically 10 bludgeoning damage). That creature can use the Grab an Edge reaction to avoid falling.
Reset: Creatures can still fall into the trap, but the trapdoor must be manually for the trap to become hidden again.
Source: Core Rulebook pg. 522