Rigorous training using killers as opponents has paid off. Now your melee warriors can easily block their furious attacks. Upgrading this Knowledge increases the defense of your melee troops against killers.
| Level | Gold | Soul Shard | Time | Requirements | Melee defense against killers | Influence | Hero’s Experience |
| 1 | 135K | 26.5K | 51w 5d 00h 00m 00s | Training Limit I 1, Oracle 36 | 0,5% | 15.5K | 41K |
| 2 | 200K | 39K | 76w 5d 00h 00m 00s> 1 Year(s) | Training Limit I 2, Oracle 36 | 1% | 35K | 51K |
| 3 | 270K | 57.5K | 113w 6d 00h 00m 00s> 2 Year(s) | Training Limit I 3, Oracle 36 | 1,5% | 79K | 64K |
| 4 | 340K | 85.5K | 169w 1d 00h 00m 00s> 3 Year(s) | Training Limit I 4, Oracle 37 | 2% | 180K | 80K |
| 5 | 410K | 130K | 251w 1d 00h 00m 00s> 4 Year(s) | Training Limit I 5, Oracle 37 | 2,5% | 405K | 99.5K |
| 6 | 480K | 190K | 372w 6d 00h 00m 00s> 7 Year(s) | Training Limit I 6, Oracle 37 | 3% | 910K | 125K |
| 7 | 560K | 280K | 553w 5d 00h 00m 00s> 10 Year(s) | Training Limit I 7, Oracle 37 | 4% | 2.05M | 155K |
| 8 | 680K | 415K | 822w 2d 00h 00m 00s> 15 Year(s) | Training Limit I 8, Oracle 38 | 5% | 4.65M | 195K |
| 9 | 895K | 620K | 174w 3d 00h 00m 00s> 3 Year(s) | Training Limit I 9, Oracle 38 | 6,5% | 10.5M | 235K |
| 10 | 1.4M | 915K | 1 813w 1d 00h 00m 00s> 34 Year(s) | Training Limit I 10, Oracle 38 | 8% | 24M | 290K |
| 5.37M | 2.76M | 4 399w 00h 00m 00s> 84 Year(s) | 65% | 42.82M | 1.34M |
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