He delved further down, spiralling through apertures ringed with hooks and flesh-tearing crystal shards. Everything was sharp, designed to cut and tear – it was a city of knives, an entire world built from scalpels. The screaming began to change note, from horror to fury. He saw fighting in the high places – xenos against other xenos, a whirl of blades and the scatter of blood against the onyx walls. Except that they were not just xenos – some of the combatants were from the unreal dimension. They were unliving, true strangers to the galaxy of physical law.