For medium troops. (% below) Chance of being triggered before attacking. 100% Accuracy, double damage caused.
| Level | Book Leaf Required for Crafting | Skill Points Required | Chance % |
|---|---|---|---|
| 1 | 100 | 36 | 5% |
| 2 | 200 | 72 | 10% |
| 3 | 300 | 108 | 15% |
| 4 | 400 | 144 | 20% |
| 5 | 500 | 180 | 25% |
| 6 | 600 | 216 | 30% |
| 7 | 700 | 252 | 35% |
| 8 | 800 | 288 | 40% |
| 9 | 900 | 324 | 45% |
| 10 | 1000 | 360 | 50% |
