User blog comment:Arbington/The Next Cycle/@comment-2250460-20120804200246/@comment-2250460-20120804202449

Since when where Harvesters intelligent?

I believe that the Reapers simply use them because they fit their purposes, but they certainly didn't exterminate them. As shown on Mordin's loyalty mission, the Blood Pack make use of Klixen similarly to how they use varren, which only further strengthens my point.