The orc sees Arriana try and cut his hand away, and quickly pivots his body, raising his crossbow to stop the powerful blade.  Unfortionatly for this Orc, his kind are well known for using second grade, outdated and well worn equipment, all of which his current crossbow fit into the category of.  So, as he raises his weapon to shield him from his enemies sword, it easily cuts through his weapon, and sinks deeply into his chest, making a sick, slicing sound, like you might hear from cutting an overipe tomato.  The orc dies instantly, little more then a single beath escaping from him.