From a young age, Vikings learn how to wield a sword and shoot a bow. Getting up early, rigorous training, bruises, cuts, and scars — all this turns them into resilient, skillful warriors. Upgrading this Knowledge increases the offense of your troops.
| Level | Gold | Soul Shard | Time | Requirements | Total Offense | Influence | Hero’s Experience |
| 1 | 105K | 21K | 41w 3d 00h 00m 00s | Siege offense during defense 1, Oracle 36 | 1% | 13K | 34K |
| 2 | 160K | 31.5K | 61w 3d 00h 00m 00s> 1 Year(s) | Siege offense during defense 2, Oracle 36 | 4% | 29K | 42.5K |
| 3 | 220K | 46.5K | 91w 1d 00h 00m 00s> 1 Year(s) | Siege offense during defense 3, Oracle 37 | 8% | 65.5K | 53K |
| 4 | 275K | 68.5K | 135w 2d 00h 00m 00s> 2 Year(s) | Siege offense during defense 4, Oracle 37 | 12% | 150K | 66K |
| 5 | 330K | 105K | 200w 6d 00h 00m 00s> 3 Year(s) | Siege offense during defense 5, Oracle 37 | 16% | 335K | 82.5K |
| 6 | 385K | 155K | 298w 2d 00h 00m 00s> 5 Year(s) | Siege offense during defense 6, Oracle 38 | 21% | 750K | 105K |
| 7 | 450K | 225K | 63w 2d 00h 00m 00s> 1 Year(s) | Siege offense during defense 7, Oracle 38 | 27% | 1.7M | 130K |
| 8 | 545K | 335K | 657w 6d 00h 00m 00s> 12 Year(s) | Siege offense during defense 8, Oracle 38 | 33% | 3.85M | 160K |
| 9 | 720K | 495K | 976w 6d 00h 00m 00s> 18 Year(s) | Siege offense during defense 9, Oracle 39 | 41% | 8.65M | 195K |
| 10 | 1.1M | 735K | 1 450w 4d 00h 00m 00s> 27 Year(s) | Siege offense during defense 10, Oracle 39 | 50% | 19.5M | 240K |
| 4.29M | 2.22M | 3 977w 00h 00m 00s> 76 Year(s) | 50% | 35.04M | 1.11M |
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