Gravity Shaft (CR 8)

A switch is on the back wall of this vertical stone shaft. Arrows point up and down.

Type: magical; Perception DC 32; Disable Device 32 Trigger touch; Reset 1 round

Effect

When the switch is flipped, the gravity reverses in the shaft, which is 100 ft high. Characters falling the entire length take 10d6 damage. There is a switch at the top as well.