Board Thread:Lore Discussion/@comment-71.226.242.68-20131113201112/@comment-25127382-20140720171446

I am pretty sure that you can't kill a Daedric Lord in Oblivion, that would be like trying to kill an essential follower without console commands, you would just keep hitting them for all of eternity, and they would just keep standing.

As for the "Destroy their realm" theory, how the hell do you destroy a realm of Oblivion? Is that even possible as a mortal? Perhaps a stronger Prince could do it, but I doubt a mortal could.