Only weeks after the Atlantis expedition had taken up residence in Atlantis, one of these devices was discovered, and its contents let loose in the city. In the device was an energy-consuming non-corporeal being, studied by the Ancients during their research on ascension. However, the consuming of energy was hazardous to human life, and prolonged direct contact with the being was lethal. Eventually, the creature was lured through the Stargate to another planet. (SGA: "Hide and Seek")