The so-called Eighteen Realms of the Demon Domain are formed by eighteen different small worlds, deeply hidden within the Tianhe, shrouded by the starry sky's thunderclouds, making it extremely difficult for outsiders to break in.
Each of these eighteen small worlds is ruled by one of the Eighteen Demon Lords.
Since the fall of the previous Demon Sovereign, the Demon Domain has been leaderless and in disarray.
Though the Eighteen Demon Lords united against external threats, internally, they were plagued by constant conflict, deceit, and sibling rivalry, all coveting the supreme position.
Until more than a decade ago, the descendant of the Demon Sovereign emerged, and with the support of a number of elders, ascended to the throne of the Demon Sovereign, gradually quelling the internal strife.
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