Learning new offensive tactics will help your warlords maintain an advantage even in the toughest siege conditions. Upgrading this Knowledge increases your army's offense against tier I warriors in battles for Fortresses.
| Level | Gold | Soul Shard | Time | Requirements | Increased Troop Offense Against Tier I in Fortresses | Influence | Hero’s Experience |
| 1 | 570K | 10.5K | 48w 6d 00h 00m 00s | Oracle 31 | 1% | 160K | 510K |
| 2 | 710K | 15.5K | 72w 4d 00h 00m 00s> 1 Year(s) | Oracle 31 | 2% | 355K | 780K |
| 3 | 850K | 23K | 107w 5d 00h 00m 00s> 2 Year(s) | Oracle 32 | 3% | 800K | 1.15M |
| 4 | 990K | 34K | 159w 6d 00h 00m 00s> 3 Year(s) | Oracle 32 | 4% | 1.85M | 1.55M |
| 5 | 1.15M | 50K | 237w 3d 00h 00m 00s> 4 Year(s) | Oracle 33 | 5% | 4.1M | 2.1M |
| 6 | 1.3M | 74.5K | 352w 4d 00h 00m 00s> 6 Year(s) | Oracle 33 | 6% | 9.2M | 2.7M |
| 7 | 1.45M | 115K | 523w 4d 00h 00m 00s> 10 Year(s) | Oracle 34 | 7% | 21M | 3.5M |
| 8 | 1.7M | 165K | 777w 3d 00h 00m 00s> 14 Year(s) | Oracle 34 | 8% | 47M | 4.45M |
| 9 | 2.15M | 245K | 1 154w 2d 00h 00m 00s> 22 Year(s) | Oracle 35 | 9% | 110M | 5.6M |
| 10 | 3.1M | 365K | 1 714w 1d 00h 00m 00s> 32 Year(s) | Oracle 35 | 10% | 240M | 7M |
| 13.97M | 1.1M | 5 148w 3d 00h 00m 00s> 98 Year(s) | 10% | 434.47M | 29.34M |
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