Walking down to the dungeons for the first potions class of year, I started to feel that same cold sensation I felt at the Black family house. I have started to associate that feeling as dark magic. The more I delve into the books from the Black library, the more they describe the cold sensation. It made me wonder if anyone at the school knew that there was dark magic permeating the air in the dungeons. The Chamber of Secrets must be thick of it, considering there’s a dead Basilisk laying on the chamber’s floor. I would have to ask Harry if there was a way down there. Salazar Slytherin must have kept his writings and other artifacts in his chamber. 