Sun

When inhabitants of Rodinia look up at the night sky, they see not only stars and galaxies, but also cosmic beings that swim through the aether like fish through water. The stars are as plankton to them, and the galaxies as strands of kelp.

Astronomers can track the migration of the great rays and the celestial squids. The ripples of the movement of their fins reach Rodinia and is harnessed by mages, granting them access to the arcane power that pulses through the very atmosphere.

A long time ago, when mountains could walk, the trolls ruled the world, stomping over whatever sprung out of the ground and whatever was erected by the mortal beings. They knew no gods or authorities. One day, however, a cosmic catfish arrived to Rodinia to lay its eggs.

That catfish, whose name is Sun, swims around the world, probing the ground with its tendrilous barbels which the inhabitants of the world see as rays of light. Its egg, the moon follows in its slipstream. It eventually cracks and the yolk falls to Rodinia.

One day, one of its eggs will hatch into a new sun, and mother and offspring will swim to a new home elsewhere in the universe.

Rodinians are mere spectators to this vital operation and pray to the gods that they will see another year before the moon hatches and Sun deserts them, leaving the world vulnerable to another unfathomable being.