http://moonsonglunaris.deviantart.com/art/MLP-Creation-Story-333326416

Many, many eons ago, long before the time of Equestria, before any mortal creature stepped foot on grass, and the world was as fresh, sweet, and new as spring, the land was inhabited by strange beings; they were as insubstantial as a thought, as fragile as hope, and stronger even than love. They were without form, and they were at peace with the thought, as many were simple enough not to wonder.

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