Alchemists have created a reagent, Magnum calcisinum, that will make metal more durable if it is hardened one more time. Armor forged from this will be heavier than usual, and so only knights should be equipped with it. This upgrade will increase your Seigniors' defense.
| Level | Lumber | Iron | Stone | Silver | Gold | Time | Requirements | Alchemists have created a reagent, Magnum calcisinum, that will make metal more durable if it is hardened one more time. Armor forged from this will be heavier than usual, and so only knights should be equipped with it. This upgrade will increase your Seigniors' defense. | Power | Hero's Experience |
| 1 | 12M | 9.4M | 14.5M | 23.5M | 45.5K | 05h 00m 00s | 1% | 50K | 130K | |
| 2 | 12.5M | 9.7M | 15M | 24.5M | 73K | 11h 00m 00s | Alchemical Laboratory 23 | 13.5% | 2.7M | 160K |
| 3 | 13.5M | 10.5M | 16M | 26.5M | 105K | 1d 03h 00m 00s | Alchemical Laboratory 24 | 26.5% | 5.5M | 190K |
| 4 | 16.5M | 13.5M | 20M | 33M | 140K | 3d 03h 00m 00s | 41.5% | 9.05M | 225K | |
| 5 | 24.5M | 19.5M | 29.5M | 49M | 195K | 1w 2d 00h 00m 00s | Alchemical Laboratory 26 | 59.5% | 14.5M | 280K |
| 6 | 41M | 33M | 49.5M | 82M | 280K | 2w 5d 00h 00m 00s | Alchemical Laboratory 27 | 80.5% | 22M | 360K |
| 7 | 71M | 57M | 85.5M | 145M | 405K | 5w 3d 00h 00m 00s | Alchemical Laboratory 28 | 105% | 34.5M | 490K |
| 8 | 120M | 96M | 145M | 240M | 600K | 1w 3d 00h 00m 00s | 140% | 53M | 680K | |
| 9 | 200M | 160M | 235M | 395M | 880K | 16w 5d 00h 00m 00s | Alchemical Laboratory 30 | 175% | 79.5M | 960K |
| 10 | 305M | 245M | 365M | 610M | 1.3M | 26w 5d 00h 00m 00s | 220% | 120M | 1.35M | |
| 816M | 653.6M | 975M | 1.63B | 4.02M | 54w 6d 22h 00m 00s> 1 Year(s) | 220% | 340.8M | 4.83M |
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