(Heartfelt thanks to Wuma Cijian, Hongfeng Fengchuiluo, Meng Mojing, Pokémon, and Invincible Origin for their rewards!)
—Gate of Babylon.
The Treasure Tool upon which the Hero King Gilgamesh relied to dominate the entire Throne of Heroes.
It was a key-shaped sword that connected to a treasure vault known as the Golden Capital, allowing its wielder to freely retrieve the items within.
This Treasure Tool existed solely because Gilgamesh had a legend of collecting every treasure from the era in which he had lived, and it had been born with that legend as its foundation.
Therefore, the vault connected to this Treasure Tool contained the prototypes of every Treasure Tool in the world.
This Treasure Tool was ranked from E to A++, with its rank changing according to the grade of the items stored in the vault.
In other words, the E to A++ ranking referred to the grades of the items placed within Gate of Babylon's vault.
If Gate of Babylon's vault did not contain any worthwhile treasures, then it would not be a particularly useful Treasure Tool. It would merely be a warehouse.
Conversely, if Gate of Babylon contained items of an extremely high rank, it could reach the highest A++ rank, instantly becoming a weapon beyond the reach of countless Heroes.
Gilgamesh used the Treasure Tools stored in the vault connected to Gate of Babylon as projectiles in battle.
However, that vault contained more than Treasure Tools alone. It also held all manner of other items.
So rather than calling it a vault containing the prototypes of all Treasure Tools, it was better described as the prototype of human wisdom: a collection of an era's treasures, technologies, and even the seeds of its legends.
And now, this Treasure Tool that had given even Noah such a headache had