Talk:Excalibur/Umbra/@comment-30956313-20180702123323/@comment-26428047-20180703032937

Well DE confirmed not all Warframes will have an Umbra Form so I speculate that only the older Warframes like those you mentioned and maybe some of the Quest Warframes (Inaros and Mirage seem likely canidates) will get such variants.

Still some of the fan favourite Warframes might get the Umbra treatment.