A Harnic god may grant a divine boon to a hero for some reason. These can be used at some later point to slightly improve the hero's chances, to introduce a slight twist to the story, or some other minor effect.
The Harnic Astrology program takes a fully functional and richly detailed Earth-based Astrology Program ("SymSolon") (GNU) and changes the parameters to produce output appropriate for the Harnic Isles and the planet (solar system) of Kethira.