The Creator

Before the great holy war, a certain deity came to create a weapon.
The purpose of the weapon was to evolve until one day it could kill the beast...

But halfway through the creator changed his mind. By interacting with the world he helped create, he changed his views, and he finally saw the greatness of his children... and himself.

With time he forgot about the weapon.

He first Placed an exaggerated condition for the awakening of the weapon.

Then he gave it his greatest gift...

Freedom of thought, a conscience.

[PS: The characters used from other franchises are random! (I created a gacha, with several characters, and the system chooses a character at random.) And as you can see, the first one was... RYOMEN SUKUNA]