Troop Offense with Hero During an Attack I
Hero
Levels in total: 10
Upgrading from 4 to 8
Upgrade cost level: 7 ×4
Gold: 93 800 000 000
Chaos Elements: 10 160 000 000
Level by level
5: 15 600 000 000 gold · 1 680 000 000 Chaos
6: 20 200 000 000 gold · 2 180 000 000 Chaos
7: 25 600 000 000 gold · 2 780 000 000 Chaos
8: 32 400 000 000 gold · 3 520 000 000 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.