User blog comment:James12708/Reapers VS. Forerunners VS. Angels from Darksiders VS. Humanity from Halo VS. Council and humanity from Mass Effect VS. Imperium of Man/@comment-3228423-20130124224540/@comment-4967682-20130125061520

The wiki cites at least three books just for the things I talked about... are you assuming all of them made the same typo?

Honestly, the only way a single Star Destroyer wouldn't completely annihilate both universes is if the Reapers decided to use their "I win" buttons, but even those would only work if there were a few Star Destroyers, not the combined power of the Imperial Fleet.