In order to speed up the time between harvests, the Reapers constructed the mass relay network and the Citadel to coordinate it. Harbinger's form, that of the Leviathans themselves, became the template for subsequent Reapers harvested from the galaxy's races on cyclical purges over the next millions of years. However, this Intelligence turned on them, slaughtering most of their kind and processing others into the very first true Reaper, Harbinger. They created an 'Intelligence' to solve the problem of organics and synthetics killing each other. Reapers had been known to exist for nearly a billion years, judging by findings from the Leviathan of Dis, an ancient Reaper corpse.īefore the Reapers came to be, the galaxy was under the thrall of a race known as Leviathans.
