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-1786741-20130122230312

Please wikia contributor, just understand that while the Reapers are pretty much deadly to everyone in the ME universe, they are somewhat weak compared to the Reapers. Hell, they're essentially the Protheans but at least 30 times more advanced. They have stronger ships, weapons, ground troops, and everything else. The Reapers would pretty much be annihilated in a single battle and that's on a good day.