Number of Warriors on a March I
Hero
Levels in total: 10
Upgrading from 2 to 4
Upgrade cost level: 4 ×2.9
Gold: 14 065 000 000
Chaos Elements: 1 508 000 000
Level by level
3: 5 655 000 000 gold · 609 000 000 Chaos
4: 8 410 000 000 gold · 899 000 000 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% · 4.5% · 5.5% · 6.5% · 8% · 9.5% · 12.5% · 14.5% · 17.5% · 20.5%
Total at max: 100%
Data: Viking Charts by Stars Night.