The opportunity to capture a strategically important location unites warriors, and the chance to make their mark on history in a grand battle strengthens their martial spirit! Upgrading this Knowledge increases your troops' defense when attacking Fortresses.
| Level | Gold | Soul Shard | Time | Requirements | Troop Defense When Capturing Fortresses | Influence | Hero’s Experience |
| 1 | 105K | 21K | 41w 1d 00h 00m 00s | Training Speed 1, Oracle 36 | 1% | 19K | 48.5K |
| 2 | 160K | 31K | 8w 5d 00h 00m 00s | Training Speed 2, Oracle 36 | 4% | 43K | 61K |
| 3 | 215K | 46K | 90w 4d 00h 00m 00s> 1 Year(s) | Training Speed 3, Oracle 36 | 8% | 97K | 77K |
| 4 | 270K | 68K | 134w 3d 00h 00m 00s> 2 Year(s) | Training Speed 4, Oracle 37 | 13% | 220K | 97K |
| 5 | 325K | 105K | 199w 5d 00h 00m 00s> 3 Year(s) | Training Speed 5, Oracle 37 | 19% | 495K | 125K |
| 6 | 380K | 150K | 296w 3d 00h 00m 00s> 5 Year(s) | Training Speed 6, Oracle 37 | 26% | 1.15M | 155K |
| 7 | 445K | 225K | 440w 2d 00h 00m 00s> 8 Year(s) | Training Speed 7, Oracle 37 | 34% | 2.55M | 190K |
| 8 | 540K | 330K | 653w 5d 00h 00m 00s> 12 Year(s) | Training Speed 8, Oracle 38 | 45% | 5.7M | 235K |
| 9 | 710K | 490K | 970w 5d 00h 00m 00s> 18 Year(s) | Training Speed 9, Oracle 38 | 56% | 13M | 290K |
| 10 | 1.1M | 730K | 1 441w 3d 00h 00m 00s> 27 Year(s) | Training Speed 10, Oracle 38 | 70% | 29M | 355K |
| 4.25M | 2.2M | 4 277w 1d 00h 00m 00s> 81 Year(s) | 70% | 52.27M | 1.63M |
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