Record of Ragnarok :”In the plot, every 1000 years, the Gods gather to discuss this destiny, but, after 7 million years, they decide that humans need to go extinct. Brunhild, eldest of the Valkyries, proposes that the humans should be given one more chance, and everyone decides on Ragnarok. Thus, thirteen humans must face thirteen gods, and if there are seven victories for humanity’s side, the balance of life will return”
Bubbles 