The stars on a kingdom represent its Kingdom Power Level.
Kingdom Power provides the following bonuses:
Level | Bonus |
0 (base) | +50 Gold per Day |
1 | Double Tribute Reward |
2 | +50 Gold per Day |
3 | Double Tribute Chance |
4 | +50 Gold per Day |
5 | Double Skill Bonus |
6 | +100 Gold per Day |
7 | Triple Tribute Reward |