In the Age of Gods, where man's domain was still limited, a king gathered all the treasure across all the lands and stored them inside a vault he had built.
Those were known as the origins of all treasures that followed.
The evidence of all mankind's wisdom and knowledge.
People started to praise it as the "Gate of the Gods."
Truly, it is.
Eventually, the "vault" itself became a Mystic more mysterious than the treasures it held.
Also, the key to the vault can only be used by the King.
The key will constantly change its shape, and the vault will constantly store new treasures.
Without the wisdom to instantly understand those Mystics, the key will never be able to open the vault's gate.
Still, the realm of humans was limited by the Age of the Gods.
The king collected all the treasures in the world,
And this is the place he built to store them.
Various treasures based on the originals would be born into the world afterward.
This is proof of human wisdom, human ingenuity.
Everyone referred to it as the "Divine Gate."
And it was indeed.
And that "storehouse" in turn was stored,
And that treasure became a mystery to exceed mysteries.
But. The key of that storehouse can only be handled by its king.
The mould of the key is constantly changing,
And its inventory of treasure increases even now.
The moment his ability to understand that wisdom is lost,
The key to the treasury will not open.