AJ: Mm.. magic of.. warmth? I don't know.
Shannon:  It's really warm in here. But.. But I thought you said that no one should use magic out in the open world, it breaks balance. Too much magic and the world will flip, or something like that.
AJ: Shoosh! I don't have any clothes for the cold weather. Just surviving here to not freeze to death, you know.
Shannon: Not sleeping on the roof in cold weather kinda helps too..
We may never know