Thanks to the new armor of tempered steel, your siege troops will be much better protected — a great advantage in battle! Upgrading the Knowledge improves the defense of your siege troops.
| Level | Gold | Soul Shard | Time | Requirements | Increased Siege Defense | Influence | Hero’s Experience | ||||||||
| 1 | 570K | 10.5K | 48w 6d 00h 00m 00s | Oracle 31, Defense Against Tier VII in Fortresses 1 | 1% | 160K | 510K | ||||||||
| 2 | 710K | 15.5K | 72w 4d 00h 00m 00s> 1 Year(s) | Oracle 31, Defense Against Tier VII in Fortresses 1 | 8% | 355K | 780K | ||||||||
| 3 | 850K | 23K | 107w 5d 00h 00m 00s> 2 Year(s) | Oracle 32, Defense Against Tier VII in Fortresses 2 | 15% | 800K | 1.15M | ||||||||
| 4 | 990K | 34K | 159w 6d 00h 00m 00s> 3 Year(s) | Oracle 32, Defense Against Tier VII in Fortresses 3 | 23% | 1.85M | 1.55M | ||||||||
| 5 | 1.15M | 50K | 237w 3d 00h 00m 00s> 4 Year(s) | Oracle 33, Defense Against Tier VII in Fortresses 4 | 32% | 4.1M | 2.1M | ||||||||
| 6 | 1.3M | 74.5K | 352w 4d 00h 00m 00s> 6 Year(s) | Oracle 33, Defense Against Tier VII in Fortresses 4 | 42% | 9.2M | 2.7M | ||||||||
| 7 | 1.45M | 115K | 523w 4d 00h 00m 00s> 10 Year(s) | Oracle 34, Defense Against Tier VII in Fortresses 5 | 53% | 21M | 3.5M | ||||||||
| 8 | 1.7M | 165K | 777w 3d 00h 00m 00s> 14 Year(s) | Oracle 34, Defense Against Tier VII in Fortresses 6 | 67% | 47M | 4.45M | ||||||||
| 9 | 2.15M | 245K | 1 154w 2d 00h 00m 00s> 22 Year(s) | Oracle 35, Defense Against Tier VII in Fortresses 7 | 82% | 110M | 5.6M | ||||||||
| 10 | 3.1M | 13.97M | 365K | 1.1M | 1 714w 1d 00h 00m 00s> 32 Year(s) | 5 148w 3d 00h 00m 00s> 98 Year(s) | Oracle 35, Defense Against Tier VII in Fortresses 10 | 100% | 100% | 240M | 434.47M | 7M | 29.34M |
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