Talk:Excalibur/Umbra/@comment-30956313-20180702123323/@comment-2604:6000:A24C:5600:2D9B:A39C:C6F5:2597-20180707045832

Except if they gave every frame the Umbra polarity those mods, and by extension part of what makes the Umbra frames really unique, would become standard.

Even makes sense lore wise that only some Umbra frames exist, considering they failed miserably because they turned on the Orokin, they probably stopped actually making them pretty damn quickly until they found the Tenno and instead made what we know as the Prime frames