This dead land is the end of the universe, initially the place where the evil entity Darkness resides after the Big Bang. The lava flows of the river Thanatos had blessed this place with such an extreme climate that no creature could honor it. Until one day, owing to the presence of The Darkness, the first race of The Nightmare - The Beast appeared and ruled this realm. And then when the fallen Omnis arrived, it was an entirely different story. Those Omnis quickly absorbed the Darkness and evolved into a more terrifying race than ever - the Demon. Then from there, The Nightmare was the beginning of all evil things that brought woe to other beings in the universe.
The Greenland was the product of all the quintessence of Aether after the Big Bang. This pure energy slowly turned into souls and gave birth to the first beings in the universe - The Omni. For being born closest to this energy source, The Omnis possess exceptional spiritual power beyond all others and celestial vision that can see things as they really are and create things. Aside from this powerful race, The Dragon is the other mighty one that was born immortal after the Big Bang. Together they, The Omni and The Dragon, have made the Greenland flourishing.
The Earth is mainly inhabited by The Human, with their curiosity and superior intelligence, they have ushered in a new period of glory and prosperity for this world. But this comes with endless waging wars, for Aether, for power, for everything. The Earth, which lies between The Greenland and The Nightmare, can be seen as the balance of power among the three realms.