When the world first opened, two ideas were born in the chaos.
One believes that "nothing should exist" - it is called the beginning, the source of all nothingness and stagnation.
One believes that "all things will eventually perish" - it is called the end, the embodiment of all annihilation and death.
They fought for countless thousands of years, and finally a group of mortals found a flaw - the Trace Keepers.
The trace keepers do not seek immortality or magical powers, they only do one thing:
Guard the fireworks in the world and prevent the existence deep in the ancient land from taking a step forward.