The practices of wise men from faraway lands will help your Hero learn how to store up energy, allowing them to maintain strength even during a whole series of incessant, fierce battles. Upgrading this Knowledge will increase your Hero’s energy reserve.
| Level | Food | Lumber | Iron | Stone | Silver | Gold | Time | Requirements | Increased Hero Energy Reserve | Influence | Hero’s Experience |
| 1 | 4K | 2.5K | 0 | 2.5K | 5K | 520 | 01h 00m 00s | 25 | 250 | 12.5K | |
| 2 | 10.5K | 6.35K | 0 | 6.35K | 11.5K | 835 | 05h 00m 00s | Oracle 9 | 65 | 575 | 16K |
| 3 | 26K | 16.5K | 0 | 16.5K | 26.5K | 1.6K | 13h 00m 00s | Oracle 10 | 120 | 1.35K | 21K |
| 4 | 65.5K | 41K | 0 | 41K | 61K | 3.2K | 1d 09h 00m 00s | Oracle 11 | 190 | 3.05K | 26.5K |
| 5 | 170K | 105K | 0 | 105K | 140K | 6.9K | 3d 09h 00m 00s | Oracle 12 | 275 | 7K | 34.5K |
| 6 | 420K | 265K | 0 | 265K | 325K | 17K | 1w 2d 00h 00m 00s | Oracle 13 | 375 | 16.5K | 44K |
| 7 | 1.1M | 665K | 0 | 665K | 745K | 36.5K | 3w 00h 00m 00s | Oracle 15 | 490 | 37.5K | 56.5K |
| 8 | 2.7M | 1.7M | 0 | 1.7M | 1.75M | 82.5K | 7w 2d 00h 00m 00s | Oracle 17 | 620 | 85.5K | 72.5K |
| 9 | 6.85M | 4.3M | 0 | 4.3M | 3.95M | 195K | 18w 2d 00h 00m 00s | Oracle 19 | 765 | 200K | 93.5K |
| 10 | 17.5M | 11M | 0 | 11M | 9.05M | 460K | 45w 3d 00h 00m 00s | Oracle 21 | 925 | 455K | 120K |
| 28.85M | 18.1M | 18.1M | 16.06M | 804.06K | 76w 13h 00m 00s> 1 Year(s) | 925 | 806.73K | 497K |
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