Cullen knows enough of the Fade and how it works to be able to follow along. One isn't a templar for this long without exposure to some of the theories and the trappings. His brow furrows as he listens closely.

"But what led you to such a field of interest initially? It seems...well, pardon me for saying it, but it seems rather morbid. Was it a natural inclination?" He knows such is so for some mages, why some take to ice and not fire and so on.

Perhaps it's different in Tevinter.