They could introduce new rules, but I must agree with Miriel that a lot of suspense is gone with this magical revival blood. And they're always all "Go for the head! It's the only way!" Well, Noah got shot right in the effin face and he still lived, so they'll probly bring Nathan back. Hmm, I wonder if Peter's blood would work if he was thinking of Claire at the time of extraction.

I still wonder why there are a few double powers showing up. Maybe they just ran out of ideas after all.