Talk:Excalibur/Umbra/@comment-179.213.73.28-20170709134057

I think that the "sacrifice" they referenced in the trailer is someone sacrificing their life to give the Tenno a second chance. I mean, you can hear the classic "heart signals" from those machines that scan a person´s heart. Maybe the tenno were too unstable with their new powers and when the frames were created, they needed a "host body" to fill the warframe.

We know that warframes have infested tissue and we know that the infestation has to use a host to live (be it metal or flesh). Maybe the "warframe" is actually a human corpse with metal augments and infested flesh.