The Great Pull

Talos was one of my favorite deities of Second Edition, mainly because his priests could hurl powerful lighting bolts.   Later editions of D&D he disappeared without a trace.  Well no more, cause I have resurrected that badazz.

Krarkauk

In the Dawn War, a team of primordials pulled an island of rock from the Sea of Entropy to the world Bal-Kriav.  They did this by creating a breach in the Web of Magic or found some other clever way to get through the boundaries between planes.  Regardless of how they did, the outcome was this huge mass of rock that settled in the Cyclone Ocean.  It came to be known as Angvild.

Two primordials then went to work on the island, shearing it away from the main landmass beneath it , and then ultimately to raise it into the clouds.  Talos and Geb worked together on this right up to the last days of the war.  The angels pursued the remaining forces of the primordials and dispatched them, imprisoned them, or drove them from the realm - some though found ways to elude their pursuers.  Talos, unfortunately did not escape the angels.  Before he was captured, he sent his and Geb's island, a place called Krarkauk adrift on the winds.  This floating island hovers over a desolate valley of Ice Cap.  Atop it, are the fortifications and blood-lines of the first storm and cloud giants of Bal-Kriav.

Gwildath and the Feywild

According to most sources, the eladrin come from the Feywild - a alternate realm that is an "echo" of 

Díronost

the Prime Material Plane.  I don't know if this means it has its own worlds or is just an alternate dimension.  I think I will go with the latter to simplify the concept.  Perhaps there is a way that things from either realm could co-exist at the same time and in same dimension.  This would have some interesting effects and probably could only be a product of chaos running wild or maybe something as simple as a feywild fuse.

Most of the eladrin of Midrêth have ancestors that were colonists from the Feywild.  They all were part of one empire, some think quite advanced, and named Gwildath.