Terra had come to hate the dark; Slade's lair barely had any light. At first she enjoyed it- the dark hid her, kept people from seeing what she had become. But deep inside, she had a longing for light.
Her master had promised that, soon, they could work outside. But they still trained, and lived, in the never-ending dark. When they took over the city, the darkness followed.
Terra knew bad things were created in the dark- things worse than a creature under the bed. In the dark, the spiralling darkness that goes on forever, monsters are created. Like her.