Conscious thought was almost impossible, but some part of Hermione recognized that she would be destroyed if she ever let go of herself. She clung to the bedrock of her Occlumency walls, which had been pressed into indestructibility during her time in Azkaban. She spun her webs again and again, felt them shatter under the strain, built them up again, until walls of the same diamond density as the foundation began to form.