There are eight divine entities in Ardania:
Standing with a god can be changed by completing or failing their quests, constructing temples on Holy Grounds, and choosing a divine perk for your kingdom at the start of a game.
Higher favor grant higher levels of Divine Spells to research and use, but it angers the other gods, especially those of an opposite alignment. Angering a god might forbid you from building a temple to them, or even cause an Avatar to be summoned:
|75||Can cast fourth tier divine spells|
Can cast third tier divine spells
|25||Can cast second tier divine spells|
|10||Can cast first tier divine spells|
|<10||Can't use divine spells|
|< -10||Can't build temples|
|-100||Avatar is summoned|
Temples grant unique units for each race:
By controlling enough Holy Ground or killing an Avatar you can win the game.
For more see Victory Conditions.
You can get some Temple units from upgrades. Example: You want Argela Temple units and your starting race is Human. You still can build a Temple of Argela in an elvish city. This way you will be able to build Spirit of Life, get Priestesses of Agrela by upgrading Healers, and get Paladins of Life by upgrading Ratman Pirates. So you will have all three temple units by building one Temple. And much faster, of course.
Works well for all gods except Grum-Gog, naturally.