"He's here!" Narcissa felt as if she could not even breathe. Her voice was shrill and tense, as though someone had her by the throat. Her face was stretched tight, her mouth gaping in terror, and she could only feel her hands and feet turning ice-cold, too frightened to draw a full breath.
Bellatrix and Narcissa had lingered in the room for too long, and Nagini, waiting off to the side, had long since grown impatient. Now, hearing the knocking outside grow more urgent along with the nursery rhyme, the panicked snake twisted its body and hissed at Bellatrix, who was still standing on the floor, flicking its tongue to urge her on a few times before turning and darting into the secret passage to flee first.
Bellatrix also began to lower the wand she had pointed at her sister, but the moment it dipped, she suddenly sprang into action. With the tip of that crooked wand, she traced a shape in the air like a sideways number "5," and a flash of white light struck Narcissa squarely—seizing the instant when Narcissa was dazed with terror, Bellatrix took her chance and fired a Petrificus Totalus.
At once, Narcissa's arms snapped tight against her sides, her legs clamped together at attention, and she stood ramrod straight. Her entire body swayed stiffly in place a few times before she toppled to the floor with a thud. Her upper and lower jaws were locked together, leaving her unable to speak—only her eyes could still move, and as she understood what her sister intended, tears kept sliding from their corners.
"Nagini!" Bellatrix called to it in the secret passage in a hoarse, grating voice. "Take Cissy. She is the wife of the Dark Lord's most valued follower."
"Then I'll huff and I'll puff and