Hogwarts castle, dark arts classroom, ancient spell books, mysterious atmosphere, dim candlelight, secret learning session, wizard student, black robes, intense focus, casting spells, Unforgivable Curses, Avada Kedavra, Crucio, Imperio, magical gestures, wand movement, sinister expressions, forbidden knowledge, eerie silence, stone walls, magical glow, 3/4 view, ambient shadows, high contrast lighting, suspenseful mood.