Answer:
An expression designed to call something to mind without mentioning it explicitly, an indirect or passing reference.
Explanation:
Example: An allusion to Shakespeare.
The main purpose of subheadings are:
They stand out because of their size and attract attention.
The scanner will stop to read them and continue scanning until the next subhead which they'll then read.
An archetypal hero is often:
Rewarded with spirituality
Born into royalty or of royal descendency