Talk:Excalibur/Umbra/@comment-204.11.129.253-20170711142737/@comment-2602:30A:2E36:C70:5408:751C:F373:A69-20170712185120

I believe that the sacrifice being spoken of isn't just regarding Umbra frames. I think the original Warframes were created by sacrificing Orokin Warriors to a controlled form of infestation. This is why each Warframe has a personality unique to it. They used to be people, but gave up there lives to enable the Tenno to fight back against the Sentients. Would also explain in the Silver Grove quest why Sylvanis is so disgusted to create Warframes. She is a medic who had to turn people into monsters. Just my theory here.