The , also known as the "True Enemy", is an evil and negative digital lifeform that evolved from the "Reaper" program that was created in the late 1970s. It would be revealed in side materials that the Reaper was based from the self-defense program utilized by the SIGINT system known as "ECHELON" and was allegedly created to delete the "Creeper" virus that infected ARPANET. The program continues to act on its programing throughout the 1980s to wipe out virtual lifeforms like the ones produced in the Artificial Life research project "Tierra" whenever its target had multiplied beyond a certain amount of memory. The D-Reaper ended up in the rapidly developing Digital World as a pinkish-red grey goo, predating the Digimon and DigiGnomes it would prey on while resetting the Digital World due to its very small Random Access Memory size at the time. But the exponential growth of the network forced the D-Reaper to enter a dormant state within the Net recesses at below the lowest of the Digital World due to its threshold being unchanged, allowing the Digital World to develop pass its Cambrian-like state.