SOOOOOOO great! It's kind of intimidating to even comment with so many wonderful comments on the board! However, I didn't see anyone else mention the hints of The Time Travelers Wife, one of my favorite novels, and thought you must have used it for a speck of inspiration? I loved the different ages that they met as, and the being snatched away. And it was such a desperate, wonderful, moving, poignant love affair they had in their brief snatches of time together.
Your Severus is just heartbreaking and so pitch perfect in voice, characterization, pathos (much as he'd hate to be described with that word). So many years of suffering, such bitterness, such denied hope. And same for Harry, although I didn't feel his anguish as deeply as Severus's. The endless waiting for that watch to start ticking must have been horrible, though.
I just loved this story, and know that I will come back to it many times in the future. Great job, amazing writing....AWESOME CONCLUSION TO THE GAMES!!!