Troop Offense with Hero During an Attack I
Hero
Levels in total: 10
Upgrading from 4 to 8
Upgrade cost level: 1 ×1
Gold: 23 450 000 000
Chaos Elements: 2 540 000 000
Level by level
5: 3 900 000 000 gold · 420 000 000 Chaos
6: 5 050 000 000 gold · 545 000 000 Chaos
7: 6 400 000 000 gold · 695 000 000 Chaos
8: 8 100 000 000 gold · 880 000 000 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.