During training sieges, Vikings in your Clan will learn not only how to attack enemies but also how to defend each other. When a real battle comes, there won't be a more cohesive troop in the whole of the North. This Knowledge increases the defense of your troops in battles for Fortresses.
| Level | Scrolls | Precious Dust | Time | Increased Troop Defense in Fortresses | Influence |
| 1 | 2 500 | 70 | 29w 12h 00m 00s | 5 | 9M |
| 2 | 3 350 | 80 | 31w 4d 12h 00m 00s | 15 | 9.1M |
| 3 | 4 450 | 92 | 35w 3d 12h 00m 00s | 25 | 9.2M |
| 4 | 6 050 | 106 | 41w 12h 00m 00s | 35 | 9.3M |
| 5 | 8 250 | 122 | 49w 1d 00h 00m 00s | 45 | 9.4M |
| 6 | 11 500 | 143 | 60w 4d 12h 00m 00s> 1 Year(s) | 55 | 9.45M |
| 7 | 16 000 | 167 | 77w 2d 00h 00m 00s> 1 Year(s) | 65 | 9.55M |
| 8 | 22 500 | 196 | 101w 4d 12h 00m 00s> 1 Year(s) | 75 | 9.65M |
| 9 | 32 000 | 232 | 138w 00h 00m 00s> 2 Year(s) | 85 | 9.75M |
| 10 | 45 500 | 275 | 193w 3d 00h 00m 00s> 3 Year(s) | 100 | 9.85M |
| 152.1K | 1.48K | 757w 3d 00h 00m 00s> 14 Year(s) | 100 | 94.25M |
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