Sorry for hogging this, but I came up with a new (unprompted) story idea in a dream.
It's about a fantasy world where there's a legend about a Goddess who used the moon to destroy the world after an arrogant king proclaimed himself as the one true God and tried to attack the Goddess. The moon cracked and spread its fragments upon a portion of the human populace with birthmarks of either a right-side-up crescent moon marking or an upside-down crescent moon marking, portraying future actions - for fair or ill, respectively - and gifting them powers. Hence, they're referred to as "Moonborn" (the title of the story, by the way).
Then comes a prophecy that a child who has markings of both will destroy the kingdom, and the kingdom, having grown corrupt and decadent after many years, sends its army to find and kill the kid. A boy on a farm, Jeremiah, is born with both markings on his wrists, and his family hides out in the mountainous wilderness to protect him, teaching him various skills to survive...until he turns twelve, and the army wipes his family out to find him.
From there, the dream turned odd; Jeremiah climbed up a mountain to survive, where he's found by an older man who sends him to the city to survive, not wanting to deal with him. Jeremiah wanders the streets (his birthmarks hidden by dirt and grime) until a guard - with a girl the same age in tow - brings them to the resident school for "truancy".
Jeremiah excels in the survivalist things, but is completely clueless about history and the like, but eventually has to escape the guards after a teacher alerts them about his birthmarks. He manages to get to the slums, and hides out in a place where the guards can't find him...but the same girl finds him and hides out in the same place, revealing that she's a Moonborn as well.
They escape into the sewers after a guard comes too close to finding their hiding spot, trying to find some more Moonborn...and that's all I dreamed of.
Does that sound similar to any other story? Because I swear, I dreamed this without reading any similar story to this (I rarely read new stories nowadays for this reason.), and I'm excited about it.