Troop Offense with Hero During an Attack I
Hero
Levels in total: 10
Upgrading from 3 to 5
Upgrade cost level: 3 ×2.4
Gold: 16 320 000 000
Chaos Elements: 1 752 000 000
Level by level
4: 6 960 000 000 gold · 744 000 000 Chaos
5: 9 360 000 000 gold · 1 008 000 000 Chaos
The price depends on the order in which you study a branch: the first costs the base price, the seventh is four times as much.
Bonus by level
2% · 7% · 7.5% · 10% · 12% · 14.5% · 18% · 22% · 27% · 30%
Total at max: 150%
Data: Viking Charts by Stars Night.