Your Clan's fame has spread throughout the North, drawing experienced warriors from distant lands to the Stronghold. These battle-hardened warlords know how to train young warriors. Upgrading this Knowledge increases the number of warriors in training.
| Level | Scrolls | Precious Dust | Gold | Time | Requirements | Increased Number of Warriors in Training | Influence | |
| 1 | 250 | 10 | 41.5K | 1w 12h 00m 00s | 2nd, | >5 | 13M | | |
| 2 | 340 | 15 | 55.5K | 1w 4d 00h 00m 00s | Infirmary Capacity III 2 | 5 | 13M | |
| 3 | 470 | 20 | 73.5K | 2w 2d 00h 00m 00s | Infirmary Capacity III 3 | 7, | >5 | 13.5M | |
| 4 | 660 | 25 | 105K | 3w 3d 12h 00m 00s | Infirmary Capacity III 4 | 10 | 13.5M | |
| 5 | 945 | 40 | 155K | 5w 4d 12h 00m 00s | Infirmary Capacity III 5 | 15 | 13.5M | |
| 6 | 1 400 | 70 | 250K | 9w 4d 12h 00m 00s | Infirmary Capacity III 6 | 20 | 13.5M | |
| 7 | 2 100 | 120 | 420K | 17w 2d 12h 00m 00s | Infirmary Capacity III 7 | 25 | 14M | |
| 8 | 3 200 | 220 | 745K | 32w 6d 00h 00m 00s | Infirmary Capacity III 8 | 32, | >5 | 14M | |
| 9 | 4 950 | 435 | 1.4M | 65w 3d 12h 00m 00s> 1 Year(s) | Infirmary Capacity III 9 | 40 | 14M | |
| 10 | 7 850 | 890 | 2.8M | 137w 12h 00m 00s> 2 Year(s) | Infirmary Capacity III 10 | 50 | 14.5M | |
| 22.17K | 1.85K | 6.05M | 276w 3d 12h 00m 00s> 5 Year(s) | 50 | 5 | 136.5M |
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