Talk:Warframes/@comment-75.137.228.124-20180615033223/@comment-27096453-20180616063046

I think all "Prime" Warframes were built that way, however only Umbra seems to have kept some form of sentience. However, it should be noted that all Warframes are made using Infested tissue, as the Grineer Queens did call them "Infested puppets".

All Prime Warframes (including Excalibur Umbra, as the "actual" Excalibur Prime is a Founder-only item and has no lore presence) would've been made by exposing a chosen warrior to the Infestation and mold them into Warframes. We know, according to Ordis, that Umbra's "Transference bolt" was different from other Warframes and his equipment predated anything we had, including Prime items.

Conclusion: Excalibur Umbra was the first Warframe, the prototype. After he went berserk, Ballas probably started working on different Transference bolts to keep future Warframes more under control.

Meanwhile, the "regular" Warframes we mostly use are Tenno-made knockoffs, probably using tissue from Helminth, an Infested entity loyal to us.