Troop Defense with Hero During an Attack I
Hero
Levels in total: 10
Upgrading from 1 to 4
Upgrade cost level: 2 ×1.7
Gold: 10 030 000 000
Chaos Elements: 1 071 000 000
Level by level
2: 1 785 000 000 gold · 187 000 000 Chaos
3: 3 315 000 000 gold · 357 000 000 Chaos
4: 4 930 000 000 gold · 527 000 000 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% · 5.5% · 6.5% · 8% · 10% · 12.5% · 15% · 18% · 22% · 25.5%
Total at max: 125%
Data: Viking Charts by Stars Night.