In stories about the origin of life, a deity is usually required to create plants, animals, and humanity, either from a pre-existing and barren world, or from chaos. In such a world, all the elements necessary for life to spring forth are already present. Life is favoured by natural elements: water, fire, earth, mountains etc. Its components are those that we know today. Often aquatic entities are the first to be created and preside over the stabilisation or evolution of the living world.
Torrential rain wipes out humanity and plunges the world into darkness. Light is restored by a duel between a large crow and a polar fox. The former needs light to hunt, the latter darkness to plunder hoards of meat. Their confrontation gives rise to the cycle of day and night.