Ghoul Ravine ultimately represented a part of the spells that had once been lost in Nanmen State. Originally, spells were rampant in Nanmen State, governed entirely by these spells. The ancestors of the Nanmen Royal Family controlled a particularly domineering and powerful spell. This spell, having evolved over hundreds of years, had become very stable. During that time, Nanmen State had reached an unprecedented level of power.
However, Nanmen State also knew that only by keeping the spells in their own hands could they ensure that Nanmen State would continue to thrive. Therefore, after more than a decade of effort, they had continuously centralized, standardized, and unified the spells of the entire state. This move promoted an unprecedented strength in the spells of Nanmen State, while it also turned many spells into Nanmen State's most mysterious secrets, and gave birth to the most formidable spells in the history of Nanmen State.
