Atmah is the great serpent that encircles the world. He is the ancestor of dragons, and was the first Regent of Wu-Yu before he sunk to the bottom of the sea to contemplate eternity. He is called the World Serpent, Dragon Encircling the World, the Natural Principle, and Ancestor of Dragon-kind.
Atmah is the primary deity of the Atmahan religion. Long ago it was a cthonic sea cult, but gradually dominion of the sea was taken over by Thauma and Wu-Yu. Meanwhile, the aspect of contemplation came to the fore in Atmahan. It is now a religion of philosophers.