Hallowed Wheel

Level 10Hazard (Complex)
HazardRareMediumLegacy
AC
30
HP
80
Speed
0 ft.
Perception
+0
Fort
+21
Ref
+15
Will
+0
Stealth
+19
Recall Knowledge DC 32 (arcana)
Disable DC 31 thievery (master) on the wheel to flip the switch returning it to a harmless carnival game, DC 26 thievery (expert) to erase each rune, or Dispel Magic (5th rank; counteract DC 28) to counteract each rune.

An ornate wheel, divided into eight segments with a rune painted on each, is mounted on a pole and controlled by a lever that can be triggered manually or a sensor that detects creatures within 30 feet in front of it.