Sorry for the double post. I actually thought of a few ideas for the plot. I'm recycling some older material of mine, but it's otherwise an original story for this specific project. The first few paragraphs outline backstory and set the stage for exploring dungeons and gathering key items. The later paragraphs outline events that occur through various cutscenes after these artifacts are gathered, setting the stage for the final dungeon and final encounter.
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The story centers on two kingdoms - Damascus and Arcania. Damascus is renowned for its powerful steel and military strength. Swords and plates of armor forged with Damascus steel are highly-sought due the steel's innate ability to absorb and nullify magic. The people of Damascus pride themselves on their independence from the arcane, having abolished and outlawed all forms of magic within their nation; Arcania, on the other hand, is a kingdom governed by a magocracy. Having little in the way of military power, the Arcanians instead focus their attention on the study of ancient arcana.
Rumor had it that the Arcanians had recently unearthed a set of artifacts left behind by the gods themselves. These artifacts could hold the power to shape the very fabric of reality, and thus render Damascus and its military power ineffectual. Fearing the implications of this, Lord Damascus declared a proclamation of war against Arcania, demanding it surrender the artifacts to the Damascene people. The Arcanians refused, believing Damascus to be misguided in its distrust of other nations.
As the war waged on, Arcania was reduced to ruin, and the artifacts were captured by Damascene generals and sealed within well-guarded tombs and dungeons scattered across every region of the world. Lord Damascus went on to establish a permanent occupation of Arcania, declaring that every last member of the Arcanian bloodline be put to death; and so, a once lustrous kingdom met its tragic end.
In a desperate outcry against the occupation, a surviving councilman solicits the help of four adventurers to seek out the artifacts and unify them in hopes of vanquishing the Damascene forces for good. Should they fail, it may not be long before Lord Damascus sets his sights on the rest of the world...
- [after gathering each artifact from the game's dungeons]
The party of adventurers is successful in recovering the sealed artifacts. In unifying them against Damascene forces, the core of the Damascene army - its renowned steel - is utterly destroyed. Unwilling to concede his defeat, Lord Damascus retires to his chambers and begins plotting his revenge. Suddenly, a spirit manifests before him, introducing itself as a member of a demonic syndicate known as "The Dominion." Realizing Damascus' desperation, it offers a bargain - the Dominion would destroy the Arcanian's resistance faction in exchange for Damascus' immortal soul, whose hatred is powerful enough to nourish the demons for many centuries. Maddened by his desire to rid the world of arcana, Lord Damascus agrees, despite knowing the Dominion would employ the power of arcana itself to achieve this end.
The Dominion lays waste to Arcanian survivors and their factions, and Damascus is dragged into the depths of Hell per contract. Our four adventurers make efforts to help Arcanian civilization rebuild after counting many losses, but they're interrupted as a new threat suddenly arises - Lord Damascus, now the ruler of the underworld, returns to the mortal realm. Rather than allowing his soul to be devoured by demons, Damascus had gradually fought his way through the legions of Hell, ultimately ascending to its throne. Empowered and bent on vengeance, he leads the very same legions into the mortal realm, declaring demonic supremacy and a threat of genocide against every mortal nation.
- [the final dungeon appears on the world map]
Our heroes are faced with one final quest. Unable to destroy the now deified Damascus, they must use the power of the artifacts to rip open a portal to the void, banishing Damascus to an eternal purgatory.
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There is actually a moral to the story - racism and prejudice are self-destructive. Lord Damascus was unduly paranoid about the Arcanians and the responsibility of arcana. When all was said and done and his forces were overpowered, he reacted by reaffirming his prejudice further, rather than embracing reason and putting an end to all the senseless conflict. That, at least, is my experience when it comes to people in real-life. No matter how you try to reason that a belief or paranoia about some group is unreasonable and prejudice is unjustified, they only reaffirm their prejudice further. It's a psychological phenomenon called reactance. If a person feels that some kind of behavioral freedom is being threatened, (even their right to hold prejudiced views) they'll only strengthen that behavior / viewpoint out of spite. Damascus represents the absolute extreme of this.
Since I've plagiarized the SaGa series so much, why not simply turn this into a fan sequel? I think I'll dub the project...
悲願の闇王 Sa・Ga4Higan no Yami-ō ("Ardent Ambitions of the Dark King")