Most of the murals and ancient lore about the matter agree it is the rebellion of Etherna against their Lord that had precipitated the creation of the All Source, the source of all energy, laws, concepts and anything imaginable in the Omniverse.
It is a weapon that could only be wielded and used effectively by the Creator and Destroyer.
In the long lore of the All Source, no one had the ability to wield it for a long period of time before dying of excess of knowledge and power.
As such, even the Seven Intergalactic Powers did not dare to touch it that much even when it was split into seven by the Elder of the Universe.
They even contained them in some magical cage so that its effect is lessened.
The Elder of the Universe ability to wield the sacred weapon is probably because of his status as one of the followers of the Creator.
He sighed a bit. He thought to himself that this is still a faraway event but he had to prepare early.
