These unattackable NPCs use Kyv Arrow and Headshot to punish those who don't follow the orders in this trial.
The other punishments are dealt out by the invisible NPC "a hazard" : a hazard begins to cast a spell. <Flashfire> a hazard begins to cast a spell. <Crippling Clamp> a hazard begins to cast a spell. <Searing Heat> a hazard begins to cast a spell. <Scalding Steam>