Troop Defense with Hero During Defense I
Hero
Levels in total: 10
Upgrading from 5 to 8
Upgrade cost level: 3 ×2.4
Gold: 46 920 000 000
Chaos Elements: 5 088 000 000
Level by level
6: 12 120 000 000 gold · 1 308 000 000 Chaos
7: 15 360 000 000 gold · 1 668 000 000 Chaos
8: 19 440 000 000 gold · 2 112 000 000 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.