Troop Defense with Hero During Defense I
Hero
Levels in total: 10
Upgrading from 3 to 8
Upgrade cost level: 5 ×3.4
Gold: 89 590 000 000
Chaos Elements: 9 690 000 000
Level by level
4: 9 860 000 000 gold · 1 054 000 000 Chaos
5: 13 260 000 000 gold · 1 428 000 000 Chaos
6: 17 170 000 000 gold · 1 853 000 000 Chaos
7: 21 760 000 000 gold · 2 363 000 000 Chaos
8: 27 540 000 000 gold · 2 992 000 000 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.