In this story, there are eight kingdoms namely:

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Here resides the heavenly beings, the gods and angels, who wields and sees the rare Light magic as the superior magic. It is named Ambrosia because in Greek mythology, they call the food of the gods by it.

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This is where demons, devils and other dark beings live. Contrary to the heavenly beings, the residents here views Dark magic as the superior magic among all. It is named after one of the three rivers of hell (in Greek mythology I think?)

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It is known that spirits prefer seclusion that's why their home can be found in the farther east of the map. They are neutral when asked what the superior magic is. I just searched the name in Google.

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Dragons are proud beings hence they live just near Ambrosia. The kind of magic commonly found here is anything related to the soil like Earth and Lava magic. I think the name is from the genus of 'dragon'fly.

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The race who resides here are the close-minded elves. They view interbreeding as vulgar and polygamy as the norm to their culture. Liliace is from the scientific name of a flower, Liliaceae.

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The home of the hardworking dwarves. They are famous for making unbreakable weapons made from smithing or alchemy. I also found the name from Google.

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The fairies are shy beings who lives between Acheron, Ambrosia and and Earthwell. Due to illegal poachers of their valuable wings, they proceeded to seclusion and rarely go out of their homes.

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This is actually a human empire which is also composed of several human kingdoms. Their rules disallows polygamy, illegal trading, kidnapping, embezzlement, etc. The name is actually derived from a fish's.