[Agramer]

Since "There was nothing" before God/s created Earth/species ,maybe God/s had to use/spend their own essence in their creation of Realm over which they will preside.

So more powerful Gods created bigger chunks of "things in existence" with more powerful making "bigger chunks"....
..Gaia made Earth (hence Earth IS Gaia) , Storm God created Storms .... than weaker Gods/Pantheons "took over" or claimed certain aspects in geographicaly limited regions :::> Norse pantheon...Greek pant. ..Egyptian...and somewhere they(Gods) fought for supremacy...

..Jahve Created Heaven and Hell and helped Gaia create Earth (after all -jahve IS "Father in heaven" while Gaia is "Mother Earth") ...

and now with "creation essence" spent lesser Gods fight among themselves for supremacy in their chosen spheres of interest.