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.

Varelay Upheaval

Karterus has seen the rise and fall of more empires than any other continent of the realm.  Ma'Ohari is the northern jungle region of this continent. 

The earliest and longest reigning empire of this region was a demon empire called Varelay.  This empire was formed by demons that eluded the angels that had beaten them during the Demon Spawn War.   In the Lith-Crillion Era, the Varelay came to dominate much of Ma'Ohari.  After subjugating most of the region, there emperor had problems keeping his demons busy, and when they weren't busy, they were fighting amongst themselves or jockeying for greater power, so they were put to work, along with their slaves, in massive civil projects.

One of the largest civil projects involved mining operations.  These were done so recklessly that they led to a long period of earthquakes and volcanic eruptions.  This period of volatility became known as the Varelay Upheaval.  The conditions wrought during this time were so bad that the kuo-toans of Tilnangau were forced into the Underdark.  The Varelay Upheaval, among other factors, would also lead to the downfall of  Varelay.

God Era

fallen angel

The Dawn Era, was a time of creation and when the gods fought the primordials, but what most don't know is that the defeat of the primordials would give rise to another great conflict.  The primordials were beaten so badly that they could no longer contain the Abyss.  This led to another great conflict called the Demon Spawn War.  This war was fought between the gods and the demons.  This happened during the God Era. 

The God Era was when many angels became gods.  One of their first great tasks was to stop the demon invaders from the Abyss.   The brutality of this conflict was such that it also led to some angels losing their status as angels, they were forsaken by the gods, becoming the Fallen Angels.  The leader of the fallen angels was Asmodeus. 

On Bal-Kriav, the Demon Spawn War affected a number of areas.  In the great wasteland of Nilzanâth, the demons built a bastion called Kodgroar.  In this place is a gateway linking the Abyss with Bal-Kriav.  During the last days of this place, the demon lord Baphomet sent his agents to plant their seeds in the fire giants of Botaff. 

Making of an Arctic Sea

The northeastern part of Midrêth is a dangerous area for travelers.  There is the Cube of Infinity, sometimes used to terminate extremely dangerous criminals.  Around this unimaginably large cube is the Forbidden Sea.  In these waters, you risk being lost to freak tidal waves.  Beyond both of these is

Silfergath, making his own prison

the Prison Continent, more commonly known as Denerra.  During the Dawn War, this continent was used to imprison primordials and some of their powerful minions.    One of those imprisoned here was a icy monstrosity named Silfergath.

Silfergath was not a thinker, he was made by Thyrm and others to serve as a living war machine.  Twice he ended up creating his own
icy prison.  His final resting place is in the cold depths of Nautrek.  This sea changed when Silfergath became entombed in its depths.  It went from being a temperate ocean to be an arctic one.

Pinnacle of Chaos

boots of the Horde of Chaos

The Pinnacle of Chaos is sited in a vault beneath Moghorob.  Long ago, a wild mage tried to enhance her power by tapping into the Elemental Chaos.  In so doing, she ended up getting herself killed, her sister killed, and opened a rift between Limbo and Bal-Kriav.  A black slaadi came through named Ushgergoon.  He would go on to form the empire of Neenth-Theen and later be a leading cause of the Chaos War.

Some of the heroes of Squad X7E may recall this place.  They fooled around with the Pinnacle of Chaos while on the Mine Splash mission.  Then, they were still wet behind the ears, and had no inklings of the device they were tampering with.

How does it all fit together?  The Entropy Fragments taken from the Pinnacle of Chaos were used in making the Entropy Arch opened at Sapthiladân.  The same one that you, Trauma Squad, are supposed to destroy.

Who is calling dibs on Oblivion?  First though, you must pry it from the dead hands Ushgergoon.

One Head Becomes Two

Ladneg the lemure and other insignificants

 
Demongorgon is a Prince of the Abyss, one of the more powerful, if not the most, of all the demon lords.  Many of the demon lords have been around a very long time.

Some time after the Dawn War, thousands, maybe
tens of thousands of years later, the gods and their angels warred with the demons.  They formed a special cadre of angels that fought the demons.  These angels became despoiled during their conflict with the demons, and would ultimately become fallen angels, and then devils, but that is another story.

The demon lords and devils have long histories, and the history of Ladneg talks about how Demogorgon nearly lost his head, and in the process became even mightier.