Long-term Imperius Curses, Dumbledore's multilayered calculations, Snape walking a fine line, and Draco's absolutely terrible planning.
Half-Blood Prince: Page 582
Half-Blood Prince: Page 582
Half-Blood Prince: Page 582
Long-term Imperius Curses, Dumbledore's multilayered calculations, Snape walking a fine line, and Draco's absolutely terrible planning.