One of the big draws at Dragoncon every year are the costumes: all shapes, all sizes, all genres. You name it, chances are there are two of 'em wandering around, a third trying to cool off in the late summer heat, and one more camped out by the Cruxshadows' table waiting for an autograph. But sometimes, just sometimes, you see something that's downright amazing. Harrison Krix, the brains and hands behind Volpin Props, along with his fiancee' Emily amazed everyone at D*C this year with costumes from the videogame Bioshock - Emily went as one of the Little Sisters, and …