Board Thread:Lore Discussion/@comment-6707115-20130619015913/@comment-7153552-20130619203859

With the right summoning on the right day with the right amount of power put into it, I'm sure they could. For the most part we see manifestations of the Princes (giant tentical ball, mystic deer apparition, etc.), but they are capable of so much more. Think about the Shiver Isles Gateway, that was after the Oblivion Crisis (timeline wise technically, even if you did it before you finishe the main quest). It's more a matter of will than ability, as well as worth. What's in it for them if they make a move on Nirn? Is there a hero ready to strike them down if they assault? Is the time right? Are they too busy squabling with one of the other Princes?