Hero's Influence During Attack on Enemy Troop Health
Hero
Levels in total: 5
Upgrading from 2 to 3
Upgrade cost level: 7 ×4
Gold: 34 000 000 000
Chaos Elements: 3 680 000 000
Level by level
3: 34 000 000 000 gold · 3 680 000 000 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
0.25% · 0.5% · 1% · 1.25% · 2%
Total at max: 5%
Data: Viking Charts by Stars Night.