The Overlord Uber-robots were deadly. To a certain extent, they had been created in the image of their creators, the overlords themselves. Only a hundred times larger. The average adult overlord grew to a height of about two meters. They had the shape of a large upside down teardrop. Their bottoms tapered off in a short tail that dragged along the floor as its owner floated on a ring like graviton-repulsion platform. The mutant overlords had nothing in their anatomy to support them on a flat surface. After thousands of years of genetic mutations aimed at enhancing their brains, their legs were gone. (The narrator considered a different analogy -- a giant floating radish with two large hands, no legs and a very large pair of eyes).