Your Dominance determines how good you are at conquering and defending islands.
Dominance is needed for:
- Exploration. Unlock new island areas by reaching the required amount of Dominance. Each new island area offers higher rewards and more challenging opponents.
- Heroes. Unlock new Heroes to use in battle by reaching the required amount of Dominance. Each Hero has a unique Power and different bonuses.
There are a few ways to gain Dominance:
- Defending islands. Each of your islands which is defended by a Hero produces Dominance over time. You can see how much Dominance your islands have produced since your last login via the Tributes screen.
- Winning battles. You instantly get some bonus Dominance upon winning a battle with a result of 100%.
- Vault of Hephaistos. Each chest in the Vault has a chance to contain Dominance.
- Opening chests. Daily chests and most other chests can sometimes also contain a bit of Dominance.
Your Dominance will never decrease. There is no way to lose it and you won't actually "spend" it when unlocking something which requires Dominance.