(Fairy Tale) Eight magical beings maintain the night and day. Dragons help maintain the natural world with their haunting roar to keep the natural world and the heavens in check. But then, three avatars betray their comrades and imprison all but the Wizard of Starlight and destroy every dragon, except Spike.

This is a fairy tale. Simple characters, simple (kind of simple at least) story. Not set in the Canon MLP world, but has some of the cannon characters.