User blog comment:Suparockr/List of Plotholes throughout the series/@comment-24163193-20141103163437/@comment-173.58.251.107-20141103192431

So that has to be one of the first Reapers built, nothing says Harbinger was the only one built, presumably, Harby was built, so was another Reaper, that idiot stumbled upon the Leviathans, who promptly blasted it into pieces, and then it fell onto Jartar, lay there for the billion years, and then was found by the galaxy.