Rift Nebula, Purgatory Planet.
For the natives living on this planet, the earth beneath their feet and the sky above their heads held extraordinarily profound significance. Myths and legends about heaven and earth had been passed down through the ages, and those myths were intricately connected to reality. There was probably no mortal race in the world that had undergone experiences like theirs—the ground beneath their feet was actually the remains of a super-creature as enormous as a planet, while the sky above their heads had once been covered by that super-creature's branches and leaves. They had personally lived through the era when they inhabited the lower crust, then watched with their own eyes as the upper crust was stripped away and opened by powerful mining starships, revealing an unfamiliar starry sky before the natives...
Then came the Yggdrasil spatial chain, which arrived on the planet and linked up with the planetary system, as well as the nebula vortex glittering in the night sky, said to lead to another universe...
These earth-shaking changes, which ordinary races might not experience even once in tens of millions of years, had all occurred within a few short years. They were bound to have a profound and permanent impact on the culture and religious beliefs of the natives of Purgatory Planet. In fact, those effects had already begun to emerge. Regarding the changes in heaven and earth, as well as the alien continents appearing in the sky, the elders and sages of the various tribes had successively offered explanations convincing and reassuring enough for their people. Without a doubt, those explanations would become part of myths and legends many years later.
Living myths, set plainly before everyone's eyes.
Whenever he thought that he was one of the generations who had personally experienced these myths,