Grey, everything is just grey gas.
But yet for some reason this grey has was slowly condenses in one spot, but yet the amount of the grey gas known as chaos being used wasn’t much at all.
Millions of years later
Slowly from where that chaos had condensed a seedling emerged.
Billions of years later
After billions of years the seedling had grown its first leaf. The leaf was emerald green colour with gold veins giving off a strong feeling of life.
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Trillions of years later
The seedling was now a sapling with over 10 leaves on it, on each of these leaves universes were formed, these universes were ruled by elementals, pure and raw condensation of the elements, these elementals grew to the size of stars but that was as far as they went and yet they were still comparable to dust to the sapling.
Many trillions of years later
The sapling had finally become a small tree, this tree had many thousands of leaves, on each leaf was a universe, all these universes had gone through the age of elementals which is where raw condensation of energy known as elementals died and then turn into the energy called Qi which was then used by the organisms that formed in the age after elementals to make them stronger. These tiny organisms after finding out they lived on a leaf decided to call the tree Yggdrasil, Yggdrasil liked that name and decided to keep it.