I, the Air God, notice one of my brethren creating 'oceans' beneath me. I ponder for a while, then make a little breeze on the ocean surface. The water ever so slightly moves. I then unleash my full power, making the ocean violently churn and swirl. I laugh, reveling in my own might.
In the original myth, one hag measured out how long the wool (lifespan) should be. Then there was the hag that actually did the spinning (life). And the hag that cuts the wool (death) is the most feared.
I soon realize that my atmosphere has saved these creatures from imminent destruction. I delight in this. What power this thing of mine has! I decide to immerse myself in this creation, and make myself ruler of all of it. I decide to name my new kingdom... Air.