Believing in false promises of immortality, an immensely powerful group of wizards brings the Dark Pact across the Great Divide, believing they could control them and learn their secrets. They are corrupted and are led to open a portal to the nine hells in Ghor Dranas (where Arrestok exists today) where a devilish horde pours out to begin a war called The Devastation. This war lasts for three hundred years and ultimately results in the destruction of most of the known world and it's wonders. Eventually, the mortal races win out. However, all history is lost from this time and five thousand years of progress has been destroyed.
The Dark Alliance is again cast into the Great Divide. In alliance with the remaining mortal races, the Final Archway is created to prevent the Dark Alliance from returning to the world. The Final Archway limits the Gods sphere of influence to their non-material realms. While they can still imbue others with their power, they are prohibited from entering the material planes to affect the world.