All magic. Every worlds magic? Clearly he's looked into it all, what with his deep and abiding wish to save every vampire in the world and all. He's known for it.
Took a long time yes, mostly because people don't seem to be doing anything.
Oh that puts their lives on me does it? Are you actually serious or have you fallen on your head repeatedly? You go back to the exceptional work you've been doing hunting them so far.