Wonderful! I never thought a dub-con bondage fic could be so fun! Gellert is so...effusive, (really, that's the word that keeps coming to mind) and I was immediately reminded of the memory in DH when he stole the Elder wand. This is definitely the makings of a man who would conquer the world, charming, seductive and so very manipulative.
Your writing is lovely - such rich language and a nice feel that fits the period well, and that was the most creative use of Incarcerous I think I've ever seen!