An experienced warrior knows that a battle can last several hours, that's why they expend their strength wisely. Conduct this Study to reduce your Hero’s Stamina depletion.
| Level | Food | Lumber | Iron | Stone | Silver | Gold | Time | Requirements | Reduced Hero's Stamina Depletion | Power | Hero's Experience |
| 1 | 5K | 3.25K | 0 | 3.25K | 6K | 665 | 01h 30m 00s | 0.5% | 300 | 42K | |
| 2 | 12.5K | 8.15K | 0 | 8.15K | 15K | 1.15K | 07h 30m 00s | 1.5% | 750 | 47.5K | |
| 3 | 31.5K | 20.5K | 0 | 20.5K | 37.5K | 2.35K | 21h 00m 00s | 3% | 1.9K | 53.5K | |
| 4 | 78.5K | 51K | 0 | 51K | 94K | 4.55K | 2d 00h 00m 00s | 5% | 4.7K | 60K | |
| 5 | 200K | 130K | 0 | 130K | 235K | 10.5K | 5d 00h 00m 00s | 7.5% | 12K | 67K | |
| 6 | 490K | 320K | 0 | 320K | 590K | 24K | 1w 6d 00h 00m 00s | 10.5% | 29.5K | 75.5K | |
| 7 | 1.25M | 795K | 0 | 795K | 1.5M | 53.5K | 4w 3d 00h 00m 00s | 14% | 73.5K | 85K | |
| 8 | 3.1M | 2M | 0 | 2M | 3.7M | 125K | 11w 00h 00m 00s | 18% | 185K | 95.5K | |
| 9 | 7.65M | 5M | 0 | 5M | 9.2M | 295K | 27w 2d 00h 00m 00s | 22.5% | 460K | 110K | |
| 10 | 19.5M | 12.5M | 0 | 12.5M | 23M | 690K | 68w 1d 00h 00m 00s> 1 Year(s) | 27.5% | 1.15M | 120K | |
| 32.32M | 20.83M | 20.83M | 38.38M | 1.21M | 113w 6d 06h 00m 00s> 2 Year(s) | 27,50% | 1.92M | 756K |
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