Lucius nods, and comes to sit. "I don't know as much about the fog as I'd like; mainly hearsay. A group of those in our cohort ventured in soon after I arrived. They reported unnatural creatures and a feeling of malaise bordering on insanity." He gestures at his notes. "During the incident with the giant ants, some afflicted, including the younger Narcissa, felt a compulsion, somewhat but not exactly like the Imperius, to go to the fog. I prevented her; I have not heard with certainty of others who went and returned after."