"You always talked about preserving Pure-bloods to  protect the children,  remember? Harry Potter was a baby that he tried to kill. Your precious Pureblood savior did terrible things, used Necromancy, made Horcruxes, and hid them in OUR family vault. I had to use fiendfyre to ensure it all was destroyed." Narcissa said coolly, her resolve firm. "Incendio."