[ Fissures. He vaguely remembers one when there was the first time some of those visions set in. ]

If the fault lies in the air that the mountain expels... [ Would explain why the wards against fire and magic didn't help. Because it might not have been magic. Or might have been a magic mist, which still overrides some of the wards. The thing with runes is that- they can be pretty literal at times, due to being a writing system. ]

You rest here, and let me try something. [ Caster heads to the basement and returns after a moment with dried white sage leaves. He walks to the fireplace and sprinkles them into the fire- ]

Let's see how your cleansing properties work.