Rigorous training using ranged troops as opponents has paid off. Now your siege engines can easily withstand their accurate shots. Upgrading this Knowledge increases the defense of your siege engines against ranged warriors.
| Level | Gold | Soul Shard | Time | Requirements | Siege defense against ranged | Influence | Hero’s Experience |
| 1 | 135K | 26.5K | 51w 5d 00h 00m 00s | Killer defense during defense 1, Oracle 36 | 0,5% | 13K | 34K |
| 2 | 200K | 39K | 76w 5d 00h 00m 00s> 1 Year(s) | Killer defense during defense 2, Oracle 36 | 1% | 29K | 42.5K |
| 3 | 270K | 57.5K | 113w 6d 00h 00m 00s> 2 Year(s) | Killer defense during defense 3, Oracle 36 | 1,5% | 65.5K | 53K |
| 4 | 340K | 85.5K | 169w 1d 00h 00m 00s> 3 Year(s) | Killer defense during defense 4, Oracle 37 | 2% | 150K | 66K |
| 5 | 410K | 130K | 251w 1d 00h 00m 00s> 4 Year(s) | Killer defense during defense 5, Oracle 37 | 2,5% | 335K | 82.5K |
| 6 | 480K | 190K | 372w 6d 00h 00m 00s> 7 Year(s) | Killer defense during defense 6, Oracle 37 | 3% | 750K | 105K |
| 7 | 560K | 280K | 553w 5d 00h 00m 00s> 10 Year(s) | Killer defense during defense 7, Oracle 37 | 4% | 1.7M | 130K |
| 8 | 680K | 415K | 822w 2d 00h 00m 00s> 15 Year(s) | Killer defense during defense 8, Oracle 38 | 5% | 3.85M | 160K |
| 9 | 895K | 620K | 174w 3d 00h 00m 00s> 3 Year(s) | Killer defense during defense 9, Oracle 38 | 6,5% | 8.65M | 195K |
| 10 | 1.4M | 915K | 1 813w 1d 00h 00m 00s> 34 Year(s) | Killer defense during defense 10, Oracle 38 | 8% | 19.5M | 240K |
| 5.37M | 2.76M | 4 399w 00h 00m 00s> 84 Year(s) | 65% | 35.04M | 1.11M |
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