Troop Offense with Hero During an Attack I
Hero
Levels in total: 10
Upgrading from 0 to 7
Upgrade cost level: 3 ×2.4
Gold: 51 372 000 000
Chaos Elements: 5 523 600 000
Level by level
1: 372 000 000 gold · 27 600 000 Chaos
2: 2 520 000 000 gold · 264 000 000 Chaos
3: 4 680 000 000 gold · 504 000 000 Chaos
4: 6 960 000 000 gold · 744 000 000 Chaos
5: 9 360 000 000 gold · 1 008 000 000 Chaos
6: 12 120 000 000 gold · 1 308 000 000 Chaos
7: 15 360 000 000 gold · 1 668 000 000 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.