Warriors who possess a hunger for victory and an irrepressible martial spirit will rush into the fray of bloody battles. Upgrading this Knowledge increases your troops' offense when attacking Fortresses.
| Level | Gold | Soul Shard | Time | Requirements | Troop Offense When Capturing Fortresses | Influence | Hero’s Experience |
| 1 | 175K | 34.5K | 68w 3d 00h 00m 00s> 1 Year(s) | Tier VIII warrior defense in Fortresses 1, Oracle 36 | 3% | 19K | 48.5K |
| 2 | 265K | 51.5K | 101w 5d 00h 00m 00s> 1 Year(s) | Tier VIII warrior defense in Fortresses 2, Oracle 36 | 9% | 43K | 61K |
| 3 | 355K | 76K | 150w 6d 00h 00m 00s> 2 Year(s) | Tier VIII warrior defense in Fortresses 3, Oracle 37 | 15% | 97K | 77K |
| 4 | 445K | 115K | 224w 1d 00h 00m 00s> 4 Year(s) | Tier VIII warrior defense in Fortresses 4, Oracle 37 | 23% | 220K | 97K |
| 5 | 540K | 170K | 332w 5d 00h 00m 00s> 6 Year(s) | Tier VIII warrior defense in Fortresses 5, Oracle 38 | 32% | 495K | 125K |
| 6 | 635K | 250K | 494w 1d 00h 00m 00s> 9 Year(s) | Tier VIII warrior defense in Fortresses 6, Oracle 38 | 44% | 1.15M | 155K |
| 7 | 740K | 370K | 733w 5d 00h 00m 00s> 14 Year(s) | Tier VIII warrior defense in Fortresses 7, Oracle 39 | 59% | 2.55M | 190K |
| 8 | 895K | 550K | 1 089w 3d 00h 00m 00s> 20 Year(s) | Tier VIII warrior defense in Fortresses 8, Oracle 39 | 78% | 5.7M | 235K |
| 9 | 1.2M | 815K | 1 617w 6d 00h 00m 00s> 31 Year(s) | Tier VIII warrior defense in Fortresses 9, Oracle 40 | 100% | 13M | 290K |
| 10 | 1.85M | 1.25M | 2 402w 3d 00h 00m 00s> 46 Year(s) | Tier VIII warrior defense in Fortresses 10, Oracle 40 | 130% | 29M | 355K |
| 7.1M | 3.68M | 7 215w 3d 00h 00m 00s> 138 Year(s) | 130% | 52.27M | 1.63M |
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