Wow...
This is... beautiful, just beautiful. Your use of light and shadow is amazing: the way it enhances Snape's lips and chin while keeping his features in the dark and the way it keeps straining the eye towards him while Harry takes most of the actual place in the scene is... awesome, really. And seeing just a bit of Lucius... keeping me wondering 'what is he doing?''what expression is he showing?''what's on the other side?' it really brings the watcher into the scene. A work well done, if I've ever seen one.