There once was a land where the people didn't know about demons and insisted on burning everything. They learned that by melting things and setting them on fire, they could produce what they called chemicals. With these, they amassed great riches and built extravagant castles with fantastic gimmicks, which the barons constructed in order to compete with one another, in a game of one-upmanship that pushed the very boundaries of physical possibilities. Towers were built so high that from their tops you could look down upon fireworks and aircraft.

With their knowledge of combustion, the people produced jet propulsion, and hopped across continents en mass. However, because these people were frenzied by the explosion of physical dominance that science had unleashed, they overlooked the wicked force of the demonic hoards. For even a child should know that whenever you burn something, a small demon (known as a 'Syet') slips through the hole created in the fabric between the realms of the overworld and the underworld.
Given enough time and misuse of the terrific power of flame, once a group of not less than fifty Seyts gather together, they perform a summoning ceremony (with the combined power to summon a true demon in the form of a 'Hralx') . It takes a while for the Syets to cross between the worlds, and longer still for them to reunite, but time passes more quickly than most admit. Within decades of misuse, the first Hralx's crossed over, and began toying with the unsuspecting populace (whose complete faith in their religion of science left them completely open to attack from the realm of the fantastic).
They started small, by tampering with weather systems and gathering power by destroying wildlife that the people didn't care about enough to protect.
As the decades became centuries, the Hralx's had multiplied enough, and gathered enough power to bring across the worst demon that had ever been seen in the overworld. His name was Throg, and he especially hated people who didn't burn incessantly, which slowed the seeping of power over to him. In order to speed up the process of change from lightworld to darkworld, he added salt powders to the flames, which released gasses that entranced the people and made them attack each other.
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