How the world was frozen

"I do not believe the story of Nishta and Nushta. Everybody tells it differently. If asked, I will tell you of the great Nushta, who made everything. But my teacher told me of how Nushta was betrayed by Nishta and his teacher told him how the great Nishta spilled his blood by accident. What did his teacher tell him?"
-unknown Storyteller

Summary

If a child asks, how they world was made, the parents can either bring it to the storytellers or to those that can see the signs of the Gods. Both will tell a similar story.

"In the beginning, Nushta made the world. Then, he made humans from his own seed, animals from his own flesh and plants from his own hair. For a long time, Nushta was happy with his creation and continued to make animals and plants. His brother Nishta however, jealous of what Nushta had created, challenged him. "I can make animals stronger and plants more beautiful, mountains that reach even higher and seas even deeper. Give me your world for only a year and you will see." Nishta was not as skilled as his brother however. Every animal he created ate another animal, every plant he made grew thorns and no matter how often he tried, the humans he created were all vicious beasts. On the last day, Nishta poured his own blood onto the world and gave it his very own strength. Thus, magic was created. Only the humans and animals that lived hidden away in a tall mountain were not bathed in the blood of Nishta.
On the next day, after exactly one year had passed, Nushta came looking for his creation, but when he saw what Nishta had done, he was struck by anger. No creation should have the might of a god! In his wrath, Nushta killed Nishta and buried everything that was touched by Nishtas blood, with Nishtas own flesh.
Soon Nishtas flesh grew cold, but since he was a God, it could not rot. So Nushta turned it into everlasting ice, so that everyone would remember what his brother had done.
Unknowingly to Nushta, some pixies survived his violent outburst by pretending to be stone. The humans, angered by the magical beings that caused the doom of their world, hunted those remaining pixies over the whole world. As they captured the last one however, the humans realized that they had been hunting for so long, they had forgotten how to build the houses they had been living in and how to make the tools they had been using. So they returned to their old villages and continued hunting, for they knew of nothing else."

Historical Basis

First, the creation myth was the story of how the ancestors lost everything to the cold, but as the cold became the only known environment, the importance of the ancestors was replaced by the need to explain the world.
Quote from a village elder: "The ancestors were almost as godlike as the Gods themselves. They knew how to split mountains and how to make tools we can still use today. But they are long gone and only the Gods decide our fate."