The world was not always as it is now...
The years come and go in their seasons. The tides ebb and flow beneath the moon. But once, there were no seasons. Once, there was no moon. The whole of the earth lay locked below snow and ice, save for a thin belt of warmth where lived a people of ancient days and ancient memories. They alone recall what it was like then, six thousand years ago, at the end of one age of the earth and the beginning of another, when a dark star passed over the world, blotting out the sun.
For nine days, it was as night. Darker than night, for night comes with the hope of dawn. Beasts howled in the pitch black. Great trees curled and shed their evergreen leaves. In the torchlight, the ancient folk looked to their houses of wisdom and found them empty of all but despair.
But on the tenth day, the Dark Star receded in the heavens, and after came the morning again. The Elder Folk awoke to find the world changed. The sun, its course once steady, now veered across a sky roiling in shifting seasons. Their warm, green country slowly turned to desert.