"Quite literal darkness could consume the literal and metaphorical hearts of people and worlds. For most, this would mean instant death and destruction. The minuscule percentage of a world's population with extraordinarily strong will and minds may survive as Nobodies, beings without hearts. From then on they would have to continuously struggle against being unraveled into nothing," Yrael explains. It feels very much like how utilizing Free Magic works, to him. It will destroy you eventually, but the stronger your mind is, your will, the longer you will last, and the greater things you might achieve with it.

"Generally, they were rendered nearly mindless by the loss, as well, though thirteen Nobodies were of such a strength of will as to keep their human forms and names and minds. Some of these Nobodies found their way to Milliways, and it is of them we speak."