Board Thread:Lore Discussion/@comment-71.226.242.68-20131113201112/@comment-121511-20150304012406

100.3.165.204 wrote: Though could the power of a Daedric Lord be taken from them? I recall that Umbra was used to take much of Clavicus Vile's power. And half of his power was partitioned within Barbas (who is an entity separate from Vile), so perhaps he could have part of his power taken from Barbas' body. I think Sheogorath plans of killing Barbas as well, but that might just be his usual spill or be assuming that he would manifest himself again in a few centuries.

Umbra was a part of Clavicus Vile, just as Barbas is. They're "separate" entities insofar as they can conspire and act against his will, but they are ultimately a part of his being. It isn't possible to "steal" a Daedric Prince's power, as that power is a part of what the Daedric Prince is. As I said, a God's power is a part of him, not something that he wields.