Darkfly Tool Use -

Armed with this knowledge, Eli returned to Ashwood and shared his findings. The villagers were amazed by the simplicity and potential of the method. Together, they built a makeshift tool based on Eli's descriptions. It was a basic form of what one might call a "darkfly" device, though it didn't look like any insect. Instead, it was an apparatus with metal probes and wires, connected to a small computer that could process the data.