» Fri May 27, 2011 10:26 pm
One thing people tend to ignore is that Realm <> Sphere.
A Prince's Sphere is himself. It's the essence (eg: Destruction or Darkness etc.) The Realm is "made" (not created) by changing cast-away creatia which falls to Oblivion via the stars.
I think that both the Paradise and every other physical "realm" we see from Oblivion is of same substance as Mundus, that is creatia, the substance of AE. The thing is that Paradise was "held together" by the Mankar himself, because he was the Paradise's "sphere" so to speak. At least that's how I see it.
Shivering Isles is no exception either, it's not indestructible as some people think. Daedric Realms can be destroyed, and even their Avatars can be destroyed but their Spheres, the essence of their being cannot be destroyed. Their essence is NOT touchable. It's not some hunk of rock. In fact most of the Daedric Princes are Padomaic which means they are insubstancial, should their realm be destroyed utterly, you wouldn't be able to walk there at all.
Where the Realm is is irrelevant. It's somewhere in Oblivion, which is a huge piece of almost-nothingness (think space). Same with SI and Dagon's little sigil-pockets (which IMHO are not part of his original Realm, but possibly "closer" to Nirn, but that's just a personal theory).
So in other words, first there's a Prince, he/she then catches some cast-away creatia and molds it into something substantial to reflect his essence. This is the Realm, and it is held together by whatever essence was behind molding it. Without the essence, there's nothing to keep it as it is (same for Mundus btw. I think).
How exactly was Paradise made is a different issue tho, I think that Dagon just showed/gave Mankar the means to mold creatia in Oblivion (IMHO he must've helped him in one way or another).