The M.P.D. is a pyramid-shaped Vril machine, with a circular indented interface at the front that, when the Vril Generator is applied, grants the power to control the Aether's energy. When powered by souIs, it is able to open a direct portal to the Aether, and is what drove Richtofen insane. It uses souls as a power source, as discovered by Schuster after killing a rat near it. Samantha Maxis was originally suspended within it by accident and used it to send the zombies after Group 935 members to fulfill the vengeance sought after by her father, Dr. Maxis. Following the events of Moon, Richtofen switched souls with Samantha using the Vril Generator and powering the device, thus allowing him to enter the Aether and grant him the power to control the zombies after Richtofen's Grand Scheme, and in Call of Duty: Black Ops II.
- When shot with any weapon or explosive, it will not show any signs of dents, burnage, or any bullet holes.