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Description: The Reapers are a highly-advanced machine race of synthetic-organic starships. The Reapers reside in dark space: the vast, mostly starless space between galaxies. They hibernate there, dormant for fifty thousand years at a time, before returning to the galaxy. These giant machines are ancient; their true name is unknown. "Reapers" was a name bestowed by the Protheans, the previous galactic power fifty thousand years before, and the geth refer to them as the Old Machines. In the end, the Reapers spare little concern for whatever labels other races choose to call them, and merely claim that they have neither beginning nor end. The Reapers are the original creators of the Citadel and the mass relay network. These massive constructs exist so that any intelligent life in the galaxy would eventually discover them and base their technology upon them – all part of a scheme to harvest the galaxy’s sentient life in a repeating cycle of purges that has continued relentlessly over countless millennia. A Reaper is essentially "billions of organic minds, uploaded and conjoined within immortal machine bodies." In terms of physical design, Reapers bear superficial resemblance to a cuttlefish or squid, with a bulky semi-cylindrical body, a tapering plate over the rear and five tentacle-like "legs" or arms extending from its front end, in addition to six jointed legs extending from its body. The rear-most of the larger legs have crescent-shaped extensions. Colossal in size, Reapers are known to range from 160 meters to over 2 kilometers in length. The core of any Reaper is constructed in the image of the species that was harvested to create it, while the exterior follows a standardized design that is most efficient for their purpose. When the Reaper fleet is revealed in dark space, they are shown to all share the same basic design, but with great diversity in limb number, shape and orientation, some with extended heads and others having multiple glowing lights. This may illustrate the variety of Reaper subtypes, as it is revealed during the Reaper invasion of the galaxy that several different varieties of Reaper exist. While the outward appearance varies between subtypes, all of them retain features of their forebears the Leviathans, an ancient aquatic race that dominated the galaxy in ages past. The largest known Reaper ships essentially copied the Leviathan form while the smaller ones diverge to varying degrees.