Heroes

Rock Solid I

Base reference costs and prerequisites. Supported through level 5; each row shows an explicit upgrade transition.

Upgrade costs

Rock Solid I base upgrade costs
From → To	Coins	Base work
0 → 1	75,183,700	14d 8h 26m
1 → 2	75,183,700	14d 8h 26m
2 → 3	82,702,100	17d 5h 19m
3 → 4	82,702,100	17d 5h 19m
4 → 5	90,972,300	18d 22h 39m

Requirements by target level

Level 1

(Tribe Defense II level 3 OR Legion Defense II level 3 OR Ranger Defense II level 3)
(Scholar Tower I level 25 OR Scholar Tower II level 25)

Level 2

(Scholar Tower I level 25 OR Scholar Tower II level 25)

Level 3

(Tribe Defense II level 5 OR Legion Defense II level 5 OR Ranger Defense II level 5)
(Scholar Tower I level 26 OR Scholar Tower II level 26)

Level 4

(Scholar Tower I level 26 OR Scholar Tower II level 26)

Level 5

(Scholar Tower I level 27 OR Scholar Tower II level 27)

Reference research rows describe the level being reached. Prerequisites are expanded by the planner, including shared requirements once and all required building gates.

Reference snapshot: 24 October 2026. Community table agreement does not mean every value was independently verified in-game. View sources and uncertainty.