When the Mistress of Death dies, she doesn't get to simply move on. Calla Lily Potter has been reborn over forty times since her original death. Of course, this time when she's reborn, she has one person that she will end worlds for. The Mistress of Death doesn't play fair when it comes to family. Fem HP/Avengers au ****If it doesn't follow the exact story, that's because its au and things are going to get weird.