Trial by Flame Trap

Level 5Hazard
HazardLargeRemaster
AC
0
HP
0
Speed
0 ft.
Perception
+0
Fort
+0
Ref
+0
Will
+0
Stealth
+16
Recall Knowledge DC 20 (arcana)
Disable DC 23 thievery (trained) to disable the nozzles or DC 26 arcana (expert) or DC 26 occultism (expert) to disable the nearby magical sensor

Nozzles connected to reservoirs of alchemist's fire are hidden just under the packed dirt of the floor, ready to spew burning jets when deployed.