The Nameless Sea now looked like a Tai Chi symbol when viewed from above.
On one side, the seawater was black and only the whirlpool was white. On the other, the seawater was white and only the whirlpool was black.
This was the evolved form of the Yin River and Yang River. The two rivers still existed within the sea, but they were more insubstantial than the Nameless Sea and lay hidden on another plane.
Water from the Dream River fell into the Nameless Sea and became purer after passing through the whirlpools' yin-yang transformation.
The water was astonishingly heavy, its density beyond imagination. To most living creatures, it was not water at all, but a terrifying liquid harder than diamond, steel, or extraordinary metals.
The black sea and the white sea had entirely different properties, too.
The black sea's water was intensely corrosive to life. Any creature that fell in would rapidly erode until only dry bones remained to sink into its bottomless depths.
The white sea's water was the exact opposite. It could bring the dead back to life and put flesh on bare bones. Even a creature on the brink of death would be saved by its surging vitality.
But an ordinary creature that fell into the white sea would inevitably drink great quantities of water against its will. Its body would then begin to mutate under the overwhelming vitality. What it became depended on its genes.
Evolution and degeneration might happen at the same time.
A human might end up with a mouse-like body and a brain larger than a basketball, with every facial feature crammed together. They would look more alien than an alien.
Of course, Nameless could intervene in those changes, so under normal circumstances, that would never happen. He was no demon, after