That voice carried an indescribable bizarreness, slicing through the stillness of the cellar like a blade.
"To think you actually transformed the spell I taught you into a potion... You truly are my most loyal servant."
Professor Snape froze instantly. His blood felt as though it had turned to ice, and a chill crawled up his spine. His mind went blank, as if someone had robbed him of his ability to think with a spell.
Chapter 177