Talk:Excalibur/Umbra/@comment-137.125.134.82-20161017140609

What if these Umbra are the tenno that rejected the lotus and instead sided with the surviving Orokin(or the sentients in rebellion to the orokin and didn't seperate after the end) hence the name The War Within.

That or they might be the defenders of the moon, the defenders of our bodies hence their improved stats. They are called Umbra because they live in the darkness of the void consistently.