Advanced Protection IV

Base reference costs and prerequisites. Supported through level 10; each row shows an explicit upgrade transition.

Upgrade costs

Advanced Protection IV base upgrade costs
From → To	Wood	Food	Coins	Medals	Base work
0 → 1	28,478,700	28,478,700	76,892,500	2,100	7d 23h 21m
1 → 2	28,478,700	28,478,700	76,892,500	2,100	7d 23h 21m
2 → 3	31,326,600	31,326,600	84,581,700	2,250	9d 13h 38m
3 → 4	31,326,600	31,326,600	84,581,700	2,250	9d 13h 38m
4 → 5	34,459,200	34,459,200	93,039,900	2,400	11d 11h 33m
5 → 6	34,459,200	34,459,200	93,039,900	2,400	11d 11h 33m
6 → 7	37,905,100	37,905,100	102,343,900	2,550	12d 15h 6m
7 → 8	37,905,100	37,905,100	102,343,900	2,550	12d 15h 6m
8 → 9	41,695,600	41,695,600	112,578,200	2,700	13d 21h 25m
9 → 10	41,695,600	41,695,600	112,578,200	2,700	13d 21h 25m

Requirements by target level

Level 1

Barracks Expansion III level 1
Quick Bandaging III level 1
(Scholar Tower I level 24 OR Scholar Tower II level 24)

Level 2

(Scholar Tower I level 24 OR Scholar Tower II level 24)

Level 3

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

Level 4

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

Level 5

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

Level 6

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

Level 7

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

Level 8

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

Level 9

(Scholar Tower I level 28 OR Scholar Tower II level 28)

Level 10

(Scholar Tower I level 28 OR Scholar Tower II level 28)

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.