Aboleth Incursions

The Primordials tried to reason with the Exalted Court, saying that they were introducing too much chaos into Nasria at too fast a rate. The Exalteds brushed off their concerns and carried on. As the humanoids began to war with each other, something ancient underneath their feet began to stir.

The Old One, Cthulhu, managed to wake briefly from his eternal dream, and he spawned the most insidious creatures in all of Nasria: the aboleths. These eel-like creatures were highly intelligence and purely malevolent. With potent psionic powers, they were more than a match for any other creature on Nasria. They clawed their way up from the core of Nasria and began slaughtering and enslaving the other races as they saw fit.

With this new threat, the Primordials and Exalteds put aside their differences. The channeled as much of their power as they dared, careful not to rip the fabric of the Material Plane asunder, and they smote the aboleths. The mortal races still had quite a fight ahead of them, but after a century, the last of the aboleths retreated to the cold core of Nasria.