Holy crap!

"N", as he is known currently, is a vampire that has been stalking Blaine and the VanJulivan family, killing them down to the last, which happens to be Blaine

N in CTV

N was first alluded to by Blaine in a speech to his collected hunters. Blaine explained he first got into hunting after vampire had killed his parents and although he didn't remember the vampire's name he would always remember his face. N was nice enough to introduce himself by mailing Blaine's mother's severed head to him with a note signed only as "N". Later he appeared to threaten Tony when he found the alp meddling in Blaine's deams. When Blaine awoke he vanished in a cloud of cockroaches leaving Blaine's father's head behind and mocking Tony on his way out in the form of a rat.