Era beginning/end
The worlds were created by the gods and other beings of power, and they crafted their own realms to rule, watch, and bicker over.
The gods and beings of power appeared in the darkness, and sought to create as they pleased. Each created their own universe, their own people, and watched as the others around them did the same. The beings grew suspicious of each other, believing each was plotting and scheming to destroy their realms, and so they began to war with each other to protect their realms. However, the might of these beings was terrible, and each battle wiped out billions of worlds, slaughtered universes in the blink of an eyes. The beings would return to the vast nothing of their realms to restart, and then, they would war again, leaving nothing but death in their wakes.