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-2250460-20121114194727/@comment-2250460-20121114200829

You picked the two Forerunners who are known to ignore the Mantle as examples :|

Anyways, I don't really know much about Warhammer 40k, so it would probably be best to have someone with some information about both sides debate.