Here is another installment of exTRAPaganza, our Thursday over-the-top trap series.
Something is a little off in here, visually, but you can’t put your finger on it. Whenever a PC makes a Perception check against a dungeon element, like searching a door, wall, chest, etc, the check is at -5 as the area seems to pull away, creating sort of a tunnel vision at a distance effect. As soon as the PC stops searching, the effect goes away. For listening checks, it acts sort of like a Doppler effect.