Troop Defense with Hero During Defense I
Hero
Levels in total: 10
Upgrading from 2 to 8
Upgrade cost level: 7 ×4
Gold: 113 200 000 000
Chaos Elements: 12 240 000 000
Level by level
3: 7 800 000 000 gold · 840 000 000 Chaos
4: 11 600 000 000 gold · 1 240 000 000 Chaos
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
1% · 3.5% · 3.75% · 5% · 6% · 7.25% · 9% · 11% · 13% · 15.5%
Total at max: 75%
Data: Viking Charts by Stars Night.