So I’m curious about klaus being able to become a hybrid without having doppleganger blood to start instead it was his “first kill” that activated his curse. I am aware that Esther used doppleganger blood to turn her kids into vampires but they still needed to drink just normal human blood to complete the process. For klaus though in order to make any new hybrids he needs a human doppleganger to complete the transition so why didn’t he need a human dopplegangers blood to complete his transition and just a normal kill?