Spoiler
Not so much summoning like atronachs, but more like calling his cellphone and asking for help. Except "calling his cellphone" = dragon-shouting his name.
Already figured that much out before game came out thanks to Todd Howard...we should put spoiler tags on him sometimes...thanks for putting spoilers in any case. Summon has a variety of meanings. I did not mean to say we summoned him in the same way we do atronachs but I was not very clear. Pretty vague really.
So what's the deal with the giant door to the Shivering Isles? And Umbriel? I hear Umbriel was actually floating around Tamriel in an 'Oblivion bubble,' but how do you get a stable door to the madhouse open? You would think that, if Sheogorath ever got the crazy idea in his head to invade, he very easily could, if he wasn't so preoccupied with the Greymarch, And the Greymarch! You have an army of Daedra going around "organizing" the madhouse, what if they were to see the giant gateway to the (not quite as chaotic) Mundus?
Granted, it was only one door out in the middle of a lake. However, you still could send skirmisher squads through.
Granted, it was only one door out in the middle of a lake. However, you still could send skirmisher squads through.
See below
Sheogorath's portal was an invitation. Mortals go in, mortals go out, Daedra stay put. So no, no one could send skirmisher squads through, that portal was mortal only.
Pretty much this in a nutshell. It did not violate the pact of mundus. Daedra cannot pass through the portal at all. It was an open invitation to the realm of madness for mortals.
As far as Umbriel is concerned. Think of it like a loophole in the pact of mundus. Proof that TES 'gods' are not infallible in any way imo. Not that it was a big assumption they were but still. How they summoned a piece of Oblivion into Mundus idk though. Idk if we got a decent explanation about that.