Friday Encounter: Chamber of Tremors

Here's a fairly simple dungeon puzzle I used to great effect at my last session. It's based on Zhang Heng 's Han Dynasty-era seismoscope, which was used to detect the direction of approaching earthquakes. Growing up, I had a book on the ancient world with a diagram of the device, which astounded me then and stuck with me well into my adulthood - so it only seemed fitting it would one day find its…