Tumbler Lock


A door is at the top of the stairs, immediately next to the top stair with no landing.

Mechanical Trap

The lock has a mechanism in it that is attached to the stairs. When the lock is turned, the stairs each rotate 90 degrees.

A DC 14 Wisdom (Perception) check reveals that each stair has a small gear wheel on the right side, barely visible.

When the lock is opened without the key, each stair rotates 90 degrees. Any creature on the stairs must make a DC 14 Dexterity saving throw or fall down the stairs to the bottom, taking 1d6 damage for each 15′ of stairs between the creature and the bottom. The staircase is 30′ long.

Opening the lock requires a DC 16 Dexterity check with thieves’ tools.

The trap can be disarmed with either a DC 18 Dexterity check with thieves’ tools at the lock, or each stair can be jammed. Jamming a stair requires a DC 10 Strength check and something like a nail to jam next to the gear. If only one side of the gear is jammed, a DC 12 Intelligence (Investigation) check is required to determine the direction of rotation. Failure indicates that the wrong side was jammed, and stair will not be disabled.


Categories: 5e, Dungeons and Dragons, mechanical | Tags: , | Leave a comment

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