Cavalry Offense with Hero Against Siege
Hero
Levels in total: 10
Upgrading from 4 to 8
Upgrade cost level: 7 ×4
Gold: 93 800 000 000
Chaos Elements: 10 160 000 000
Level by level
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
0.5% · 1.25% · 1.25% · 1.5% · 2% · 2.5% · 3% · 3.5% · 4.5% · 5%
Total at max: 25%
Data: Viking Charts by Stars Night.