The Way of the Era

The era ends, the era begins, everything in the world ebbs and flows, and the fetters between civilizations are another continuation. Everything is a cycle. From the beginning of the artificial doomsday in the Fire Era to the peak of civilization in the Earth Era, the descendants of the Fire Era are looking for a way back to their roots in space. When we meet in different eras, sparks continue. Why did God write a final chapter?