The Gree device represents a construction derived from the schematics of the ancient Gree technology. Its intended function was to initiate the launch of the mythical Gree Hypergates. This device, fashioned into a metallic sphere, harnessed the power of dark matter, theoretically possessing the capability to trigger a catastrophic event.
During 25,793 BBY, the Stargazer cult commissioned the creation of this device from scientists operating within a clandestine underground laboratory situated on the planet Nox. Their aim was to utilize this technology to activate a hypergate located on Tython, facilitating their escape from the star system. Upon acquiring the device, the Stargazers journeyed to Sunspot to procure the scarce element marionium, which they employed to imbue the device with dark matter. Nevertheless, Dalien Brock, the leader of the Stargazers, was prevented from executing his scheme, meeting his demise just before he could activate the device. Subsequently, the device was transported to the Temple of Science of the Je'daii Order, Anil Kesh.
The Gree device made its initial appearance in Dawn of the Jedi: Into the Void, a novel published in 2013 and authored by Tim Lebbon.