Answer:
something hidden but important, something that shapes the meaning or effect of something else, without being explicit itself.
Explanation:
I want to say either diaries or fashion magazines. Diaries are much more story like and could be a little lathered up for lack of a better word. However I would go with fashion magazines, which talk about whatever's popular at the time, giving you a quick general outlook on the time period.
A gods will is supreme over a mortal's will.
The questions answer is Meteoroid. Hope this helps. Good luck