Ixcoatli

Ixcoatli, the Empire of the Winged Serpent, is Outside the Land, to its north and west.

From the Corebook (pp. 93-94)
In the uttermost East, beyond the city-state of Nechara and fungus-ravaged Elytrum, stand the mounds and ziggurats of Izahuaca—the capital of Ixcoatli, the Empire of the Winged Serpent.

Ages ago, the serpentfolk—a people of great builders, administrators and soldiers—battled the raitonfolk’s scholarly warrior-priests across a thousand miles of forest. Then the Contagion all but exterminated the feathered peoples, and the flood of Fair Folk that followed razed the cities of the serpents to the ground and slaughtered their gods.

Years later, the serpentfolk encountered the surviving raiton clans. Rather than resuming their wars, the two groups merged. While the libraries of the serpents had burned during the advance of the Fair Folk, the raitonfolk preserved scrolls, books, and song dealing with the shared history of the two peoples, making their lore indispensable.

The serpentfolk still overwhelmingly dominate modern Ixcoatli in terms of population, forming its ruling class of bureaucrats and merchants. Meanwhile, the raitonfolk occupy an enshrined position in the nation’s caste system—priests, scholars, military officers and occasionally assassins, their collective cultural wing is the theomilitary. Those lacking the blood of serpent or raiton are consigned to the lower castes. Their empire encompasses hundreds of villages, towns, and lesser cities, keeping a steady flow of tribute and slaves flowing back to Izahuaca.

From Kid Kong
The Ixcoatli gods have made incursions into Gozeiki no Bano Kami Kantaro for two generations now. They currently eye the Yggdrasil for the vast powers it affords and have attempted to forcibly wrest it form the hands of its guardian, Papa Kong, on past occasions.