Troop Offense with Hero During an Attack I
Hero
Levels in total: 10
Upgrading from 3 to 10
Upgrade cost level: 2 ×1.7
Gold: 84 745 000 000
Chaos Elements: 9 180 000 000
Level by level
4: 4 930 000 000 gold · 527 000 000 Chaos
5: 6 630 000 000 gold · 714 000 000 Chaos
6: 8 585 000 000 gold · 926 500 000 Chaos
7: 10 880 000 000 gold · 1 181 500 000 Chaos
8: 13 770 000 000 gold · 1 496 000 000 Chaos
9: 17 850 000 000 gold · 1 955 000 000 Chaos
10: 22 100 000 000 gold · 2 380 000 000 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.