Cleansing Cascade
Level 7HazardHazardUniqueMediumLegacy
AC
0
HP
0
Speed
0 ft.
Perception
+0
Fort
+0
Ref
+0
Will
+0
Stealth
+17
Recall Knowledge DC 33 (arcana)
Disable DC 25 religion (expert) to ceremonially purify everyone in the room, by pouring water from a tub over their hands, or Dispel Magic (4th rank; counteract DC 25) to counteract the corrupted ritual magic.
The ritual power in this room, corrupted by necromantic energy, slams purifying water into all "unclean" creatures that try to leave.