A common goal unites and emboldens. Warriors won't flinch in the face of danger and will furiously fight to the last breath! Upgrading this Knowledge increases your troops' offense when guarding Fortresses.
| Level | Gold | Soul Shard | Time | Requirements | Troop Offense When Guarding Fortresses | Influence | Hero’s Experience |
| 1 | 175K | 34.5K | 68w 3d 00h 00m 00s> 1 Year(s) | Troop Offense When Capturing Fortresses III 1, Oracle 36 | 3% | 19K | 48.5K |
| 2 | 265K | 51.5K | 101w 5d 00h 00m 00s> 1 Year(s) | Troop Offense When Capturing Fortresses III 2, Oracle 36 | 9% | 43K | 61K |
| 3 | 355K | 76K | 150w 6d 00h 00m 00s> 2 Year(s) | Troop Offense When Capturing Fortresses III 3, Oracle 37 | 15% | 97K | 77K |
| 4 | 445K | 115K | 224w 1d 00h 00m 00s> 4 Year(s) | Troop Offense When Capturing Fortresses III 4, Oracle 37 | 23% | 220K | 97K |
| 5 | 540K | 170K | 332w 5d 00h 00m 00s> 6 Year(s) | Troop Offense When Capturing Fortresses III 5, Oracle 38 | 32% | 495K | 125K |
| 6 | 635K | 250K | 494w 1d 00h 00m 00s> 9 Year(s) | Troop Offense When Capturing Fortresses III 6, Oracle 38 | 44% | 1.15M | 155K |
| 7 | 740K | 370K | 733w 5d 00h 00m 00s> 14 Year(s) | Troop Offense When Capturing Fortresses III 7, Oracle 39 | 59% | 2.55M | 190K |
| 8 | 895K | 550K | 1 089w 3d 00h 00m 00s> 20 Year(s) | Troop Offense When Capturing Fortresses III 8, Oracle 39 | 78% | 5.7M | 235K |
| 9 | 1.2M | 815K | 1 617w 6d 00h 00m 00s> 31 Year(s) | Troop Offense When Capturing Fortresses III 9, Oracle 40 | 100% | 13M | 290K |
| 10 | 1.85M | 1.25M | 2 402w 3d 00h 00m 00s> 46 Year(s) | Troop Offense When Capturing Fortresses III 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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