The continent of Asgard is a landmass with landscapes encompassing plains, forest, desert, and even volcanoes fed by veins of crystal. The heart of the continent is crisscrossed by several major rivers. It is conjectured that beyond the borders of the continent lies an ocean far greater in area than the landmass, but the true state of affairs remains to be confirmed.
Since prehistoric times, the continent has been inhabited by many forms of life. But with rich biodiversity comes danger: megafauna are everywhere to be found, and survival is a constant struggle.
The land is pitted with strange craters, as if it was once attacked by some gargantuan force. These craters have existed for as long as human memory. The ground inside of them is scorched in many places, and the soil seems to be toxic. Furthermore, caution is well-advised, for the craters are far from the only toxic things on this continent. A nameless mist has lain across the land since the Dark Ages, forming the Blue Mist Sea—an extremely dangerous place for both humans and animals.
This world has only one sun and one moon, the latter of which was named Caeruluna by the ancients. Caeruluna and the blue mist are similar in appearance. Both are a translucent blue, and display cyclical changes. Legend says that gazing up at Caeruluna has the same effect as inhaling the blue mist: madness.
Coincidentally, the veins of blue crystal that run deep under the ground are the very same color, inevitably leading to the question of whether these three things are connected.
Blue crystal forms this world's primary energy source. Hidden deep in the earth's crust, it exists in a state somewhere between liquid and solid; its cyclical movement makes it particularly difficult to find and extract. But once a blue crystal mine has been established, it very quickly becomes an abundant source of energy—enough to invigorate a kingdom and its armies, and determine the fate of a nation.
The ancients were well aware of blue crystal's power, but lacked the technology to extract it in quantity; it was only much later that large-scale mines were opened. Few are aware that mysterious ruins hiding an unknown power from the distant past can often be found in the vicinity of veins of blue crystal. A multitude of surviving artifacts combined with carvings left on cave walls indicate the existence of a far more advanced civilization than the ancients could have imagined.
But every rose has its thorn. Legend has it that areas where veins of blue crystal converge attract terrifying Xenobeats to feed on the substance that keeps them alive—with catastrophic consequences for the surrounding area.
The question of how to strike a balance between mining blue crystal and preserving lives is an eternal debate among the people of Asgard, as well as the source of their flexibility and adaptability.