His eyes widen at the description and he shoots another look at the unconscious(?) spectres.

"Well," he says slowly, gaze roaming over those he has yet to send on, "whatever the cause, it seems like it's infectious in some way. Did the monster emit anything like a miasma?"

All of this may be a part of his trials too, perhaps. For the oath he swore. He will have to protect people in case something similar happens again.