Troop Defense with Hero During Defense I
Hero
Levels in total: 10
Upgrading from 2 to 8
Upgrade cost level: 6 ×3.7
Gold: 104 710 000 000
Chaos Elements: 11 322 000 000
Level by level
3: 7 215 000 000 gold · 777 000 000 Chaos
4: 10 730 000 000 gold · 1 147 000 000 Chaos
5: 14 430 000 000 gold · 1 554 000 000 Chaos
6: 18 685 000 000 gold · 2 016 500 000 Chaos
7: 23 680 000 000 gold · 2 571 500 000 Chaos
8: 29 970 000 000 gold · 3 256 000 000 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
1% · 3.5% · 3.75% · 5% · 6% · 7.25% · 9% · 11% · 13% · 15.5%
Total at max: 75%
Data: Viking Charts by Stars Night.