The gods play an important role in Heroes of Aviel. Every unit and even the land itself is aligned with a god. You can only create armies from units that follow the same god and units can only attack land that is not controlled by your god. Each God has a colour which features prominently on units aligned with the gods. Lands controlled by a God are indicated with the same colour.
There will be two gods at Launch: Valara the Godess of Justice whose devotees ollowers are typically human soldiers, priests and knights, and Kadarak the God of War whose followers are typically orcish warriors and shamans and their Goblin followers. More gods will be added over time, with each god comes a new set of Land, new Heroes and Soldiers, and new Quests.
Actions in the world of Aviel will gain your Heroes the favour of their god. For example if you conquer an opposing city or clear a dungeon the Heroes in the battle will gain Favour. Unlike experience points Favour can also be lost, for example if you decline a battle or lose a battle you will lose Favour. Favour is one of the most important 'scores' in Heroes of Aviel and will be the basis of the main leaderboard.
Aside from serving as a leaderboard Favour also unlocks in-game features such as reducing the recovery time from exhaustion or access to new quests.