Nice observations about the sword Koos, I'd missed that. Definitly the sword Dracula took out in his castle.
bishopcruz, maybe Dracula didn't let him do it? Maybe Dracula hands him the sword to kill Toru and Xander kills him instead (then possibly Toru afterwards.)
Very interesting idea about Dracula perhaps allowing Renee to die. Perhaps he saw Toru sneaking up from behind? Or perhaps he says something incredibly awful in regards to Renee's death and Xander doesn't put up with it anymore?
Or perhaps Xander just puts a stop to forming allies with evil vampires which is a valid reason to dust him in the first place. Perhaps he's really had enough of vamps after Renee died and is making a point that they're done dealing with them? Which I personally find a whole more believable than the idea he's actually formed a bond with Dracula.
Or you know.. it could just be Toru he's dusting and not Dracula