Grinding Stairs


A spiral stairway ascends upwards.

Mechanical Trap

When a trap door is opened at the top of the stairs, the stairs begin to rotate like a drill bit, driving characters on the stairs upwards.

A DC 14 Wisdom (Perception) check reveals gears under the floor at the base of the stairs.

The stairway ends in a false trap door. When opened, it reveals a stone slab 3 inches above the door, and activates the trap.

The stairs move upwards at 5 feet per round. Anyone within 5 feet of the ceiling takes 2d6 bludgeoning damage at the beginning of their turn.

In order to move downwards, a successful DC 12 Dexterity (Acrobatics) check must be made for each movement attempted. Failure results in the target falling prone and no movement. Each move taken is at 1/5th normal movement, so 2 move actions from a 30′ base move would result in 7 feet of movement downwards (12 feet – 5 feet).

A DC 12 Dexterity check with thieves’ tools disables the gears and stops the stairs from rotating.

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

Post navigation

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Blog at

%d bloggers like this: