Alchemists have created a reagent, Magnum calcisinum, that will make metal more durable if it is repeatedly hardened. Armor forged from this will be heavier than usual, and so only knights should be equipped with it. This upgrade will increase your Flame Warriors' 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 repeatedly hardened. Armor forged from this will be heavier than usual, and so only knights should be equipped with it. This upgrade will increase your Flame Warriors' defense. | Power | Hero's Experience |
| 1 | 20M | 16M | 24M | 40M | 120K | 07h 30m 00s | 1% | 200K | 430K | |
| 2 | 20.5M | 16.5M | 25M | 41M | 265K | 1d 06h 00m 00s | Alchemical Laboratory 32 | 17.5% | 9.2M | 490K |
| 3 | 22.5M | 18M | 26.5M | 44.5M | 425K | 3d 15h 00m 00s | Alchemical Laboratory 33 | 34.5% | 19M | 550K |
| 4 | 27.5M | 22M | 33M | 55M | 620K | 1w 5d 00h 00m 00s | 54.5% | 31M | 630K | |
| 5 | 41.5M | 33M | 49.5M | 82.5M | 905K | 4w 4d 00h 00m 00s | Alchemical Laboratory 33 | 78% | 48.5M | 740K |
| 6 | 69.5M | 55.5M | 83M | 140M | 1.35M | 10w 2d 00h 00m 00s | Alchemical Laboratory 34 | 105% | 75.5M | 915K |
| 7 | 120M | 96M | 145M | 240M | 2.05M | 20w 6d 00h 00m 00s | Alchemical Laboratory 34 | 140% | 120M | 1.2M |
| 8 | 205M | 165M | 245M | 405M | 3.05M | 5w 3d 00h 00m 00s | 180% | 185M | 1.6M | |
| 9 | 330M | 265M | 395M | 660M | 4.55M | 64w 2d 00h 00m 00s> 1 Year(s) | Alchemical Laboratory 35 | 230% | 275M | 2.2M |
| 10 | 515M | 415M | 620M | 1.05B | 6.65M | 102w 3d 00h 00m 00s> 1 Year(s) | 290% | 405M | 3M | |
| 1.37B | 1.1B | 1.65B | 2.76B | 19.99M | 210w 2d 04h 30m 00s> 4 Year(s) | 290% | 1.17B | 11.76M |
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