Roman said:
Mark Hope, that was a superb explanation - many thanks! I did not realize that the vortices could survive... how many dead Sorceror Kings are there in total?
Edited to add: I also recall something to the effect that the Sorceror Kings cannot use their spell-granting power they use to grant spells to the templars for themselves personally and that this vexes them enormously. Is this actually the case and if so why?
Five sorcerer-kings (as opposed to Champions, not all of whom received vortices) are known to have been killed (Kalak, Sielba, Borys, Abalach-Re and Tectuktitlay). Kalid-Ma is another possibility, depending on whether you think that imprisonent in Ravenloft (or in obsidian orbs, if you don't use the Ravenloft connection) is enough to sever a vortex.
It's also the case that sorcerer-kings cannot access the elemental magics that come through the vortices. No solid explanation is given as to why, but the suggestion is that the sorcerer-kings have become fused with the conduits, and can't access them because they are actually part of them.
Raven Crowking said:
I always thought that Dark Sun was supposed to be in the Forgotten Realms' future, "When Dead Dragons Rule The Land" (or words to that effect).

. Well, not unless Toril's sun turns blue, it's moons change size, the planet floods, magic and psionics disappear entirely and all the races except for the halflings and the thri-kreen vanish without a trace. Other than that, no problem...
Roman said:
I think, but am not sure, that the Dark Sun cosmology consists of the following:
(snip)
Dark Sun has the following planes:
Athas (prime material)
Elemental Planes (earth, air, fire water)
Paraelemental Planes (sun, rain, silt, magma)
The Grey (plane of spirits and undead)
The Black (plane of darkness, cold and shadow)
The Astral (separated from Athas by the Grey)
The Ethereal (separated from Athas by the Grey, but breached by elemental conduits)
The Hollow (prison plane at the heart of the Black, containing nothing but Rajaat)
That's it. Later (athas.org) releases have expanded the concept of the Grey to allow for the inclusion of 3e rules relating to the positive and negative planes and added the Deep as nod to the Outer Planes, which are clearly present in Athasian cosmology but never defined as such (see
Terrors of the Dead Lands for more on this if you want to).