There were so many lovely parts in this fic, but if I had to single out one line-

>[...] Ezio might have even been up to evaluating this legendary Assassin’s performance.

Actually, the whole paragraph was wonderful, a nice balance between being bittersweet and humorous, and I really loved it. Ezio's observations were so in character, especially considering how much he has aged and matured. And, of course, the mindfuckery there was like a punch to the heart. Oh, Desmond. ;A;