disconnected fantasy worldbuilding detail:
a world that has a sun, but because magic it does not emit light, but rather some other thing. The moon converts that thing into light and it is bright enough to mostly function as a sun for daylight purposes. But it’s still a moon, with a lunar cycle, and so how much light there is varies over the month, making the new moon a time of extended darkness and the full moon _too_ bright
magical artefacts can function as mini-moons and also turn sunstuff into light, but of course they only work during sun-day.
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#story ideas I will never write