SYSTEM REFERENCE DOCUMENT 3.5

Shifting Stone or Wall: These features can cut off access to a passage or room, trapping adventurers in a dead end or preventing escape out of the dungeon. Shifting walls can force explorers to go down a dangerous path or prevent them from entering a special area. Not all shifting walls need be traps. For example, stones controlled by pressure plates, counterweights, or a secret lever can shift out of a wall to become a staircase leading to a hidden upper room or secret ledge.

Shifting stones and walls are generally constructed as traps with triggers and Search and Disable Device DCs. However they don’t have Challenge Ratings because they’re inconveniences, not deadly in and of themselves.

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