Ex nihilo

"So…so…the not-so-dead rat man is going to Hogwarts to kill your orphaned godson?" "Yes." "And rat man is going to kill him because he's working for You-Know-Who and only you know that he's alive and not actually dead?" "Yes." "And if you don't break out of here and kill rat man he'll kill Harry Potter?" "Yes." Elena whistled. "That's rough, man." Sirius/OC fic, AU, Azkaban