The more you sweat in times of peace, the less you bleed in war! Your warriors train hard, so your enemy must try even harder to defeat them! Upgrading this Knowledge increases the defense of your troops.
| Level | Gold | Soul Shard | Time | Requirements | Total Defense | Influence | Hero’s Experience |
| 1 | 105K | 21K | 41w 3d 00h 00m 00s | Siege defense during defense 1, Oracle 36 | 1% | 13K | 34K |
| 2 | 160K | 31.5K | 61w 3d 00h 00m 00s> 1 Year(s) | Siege defense during defense 2, Oracle 36 | 4% | 29K | 42.5K |
| 3 | 220K | 46.5K | 91w 1d 00h 00m 00s> 1 Year(s) | Siege defense during defense 3, Oracle 37 | 8% | 65.5K | 53K |
| 4 | 275K | 68.5K | 135w 2d 00h 00m 00s> 2 Year(s) | Siege defense during defense 4, Oracle 37 | 12% | 150K | 66K |
| 5 | 330K | 105K | 200w 6d 00h 00m 00s> 3 Year(s) | Siege defense during defense 5, Oracle 37 | 16% | 335K | 82.5K |
| 6 | 385K | 155K | 298w 2d 00h 00m 00s> 5 Year(s) | Siege defense during defense 6, Oracle 38 | 21% | 750K | 105K |
| 7 | 450K | 225K | 63w 2d 00h 00m 00s> 1 Year(s) | Siege defense during defense 7, Oracle 38 | 27% | 1.7M | 130K |
| 8 | 545K | 335K | 657w 6d 00h 00m 00s> 12 Year(s) | Siege defense during defense 8, Oracle 38 | 33% | 3.85M | 160K |
| 9 | 720K | 495K | 976w 6d 00h 00m 00s> 18 Year(s) | Siege defense during defense 9, Oracle 39 | 41% | 8.65M | 195K |
| 10 | 1.1M | 735K | 1 450w 4d 00h 00m 00s> 27 Year(s) | Siege defense 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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