What is POV writing? That is, having multiple protagonists (of course, each protagonist has a different level of importance. ）

Ebone: A humanoid race created for all the gods. The term also applies to humanoids that have evolved into the future.

Datos: Refers to Ebone, who has lost his soul or humanity.

World Tree: Thirty-seven Overworlds in descending order, from the crown to the roots. The top near the canopy is the World Tree First World, and the bottom near the root is the World Tree World 37 World. Special areas such as canopy, roots, land of the gods, land of the dead, realm of the void, and rift in time and space are not counted.

World Tree XX World: Each world's space-time has its own barrier. You usually can't use any means to travel quickly between worlds or communicate with spells. Naturally, don't try to fly from the Nether to the Upper, as soon as you reach an incomparably thin altitude in the atmosphere, you'll be bounced off by the transparent barrier in the sky.

A passage connecting the upper and lower realms: for example. Normally, if you want to go from the fifteenth world to the sixteenth world, you have to go through the threshold between the two worlds where time and space are not divided and disordered. Almost all of these gates are guarded by special organizations and gods, and no creatures outside the "rules" that may pose a threat to other worlds pass through. (For example, Blood Beasts and Corruptors, Demon Gods who are not allowed to travel to other worlds.) ）

Tianyi Church: An angelic faith church that mainly believes in guardian angels.

End of World: Generally refers to a single world. If it were the whole world, it would be said that "the end of the World Tree".

What happened to the fifteenth world after Anusen's escape?: In twenty years, a new cycle was opened. Some of the natives who were not defeated by the apocalypse gradually recaptured the territory occupied by the blood beasts, and slowly restored the land to life. (Of course, the curse of blood has descended on the land forever, cursing every life that is born.) ）

Aya's pain and other physical sensations are about five times that of a human woman.

Steam Firearm: A gun powered by a steam pipe. Only very bulky models have some power, and because the lethality is too low, no one generally wants to use it.

Magic Guns: Guns powered by blocks of magic energy. The lethality is based on the mana of the mana block and the mana drive inside the gun. Ironically, this firearm was created by people who could not use magic, but it was only perfectly used by mages.

Eurasian currency: 100 farr = 10 roger = 1 carter. 30 Carter = 3 Eurasian Silver Coins (Euro Silver) = 1 Eurasian Gold Coin (Euro Gold). They are common in most parts of the World Tree Overworld. After the fall of the Eurasian dynasties, there were attempts by some countries to create new currencies of their own regimes, but almost all of them failed. The Eurasian dynasties that have stood for thousands of years have left a deep imprint, and trade between countries and the rest of the world still requires a common currency - of course, the Eurasian currency is the first choice.

Loth: The currency of the Permafrost. 2 los is equal to 1 farr.

Aiya's Reproduction: There is a 1 in 450 chance that Aya will give birth to males, and the rest will be girls. Aya's mother would continue to grow after giving birth to a child, reaching the appearance of a human woman at about sixteen years old. And in the fifteenth year of childbirth, he will fall into a permanent slumber and continue eternal life in his dreams.

Crow: Unlike other places, there are no pigeons in the Land of Permafrost. There are only huge, black and white letter crows. It is extremely difficult to train them, but once they can be successfully trained, their transmission value will be immense.

Regarding eating habits: Sister Rusa's hometown is located in Eloa, the seventeenth world of the World Tree, and due to the wide variety of ethnicities in Eborn, the diet is widely accepted from bread and potatoes to rice and noodles. The staple food of the Permafrost is usually bread and noodles. But unlike the regions conquered by the Eurasian Emperor, you won't find a grain of rice there – except in the North Sea.

Cutlery other than knives and forks on the permafrost: The people of the Permafrost almost all accept chopsticks because of their noodle consumption. Because noodles are so popular, it's hard to find a plate – except when you're entertaining outsiders.