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 Legionaries' 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 Legionaries' defense. | Power | Hero's Experience |
| 1 | 5.75M | 4.6M | 6.9M | 11.5M | 19.5K | 02h 30m 00s | 1% | 4K | 80K | |
| 2 | 5.95M | 4.75M | 7.1M | 12M | 31.5K | 04h 00m 00s | Alchemical Laboratory 17 | 10% | 215K | 120K |
| 3 | 6.4M | 5.15M | 7.7M | 13M | 44K | 07h 30m 00s | Alchemical Laboratory 17 | 19.5% | 445K | 160K |
| 4 | 7.95M | 6.4M | 9.55M | 16M | 60K | 21h 00m 00s | 30.5% | 730K | 205K | |
| 5 | 12M | 9.5M | 14.5M | 24M | 82.5K | 2d 03h 00m 00s | Alchemical Laboratory 19 | 43.5% | 1.15M | 275K |
| 6 | 20M | 16M | 24M | 40M | 120K | 4d 18h 00m 00s | Alchemical Laboratory 19 | 59% | 1.8M | 385K |
| 7 | 35M | 28M | 41.5M | 69.5M | 175K | 1w 3d 00h 00m 00s | Alchemical Laboratory 20 | 77.5% | 2.75M | 555K |
| 8 | 59M | 47M | 70.5M | 120M | 260K | 2w 4d 00h 00m 00s | 100% | 4.25M | 810K | |
| 9 | 95.5M | 76.5M | 115M | 195M | 380K | 4w 2d 00h 00m 00s | Alchemical Laboratory 21 | 130% | 6.4M | 1.2M |
| 10 | 150M | 120M | 180M | 300M | 550K | 6w 5d 00h 00m 00s | 160% | 9.45M | 1.7M | |
| 397.55M | 317.9M | 476.75M | 801M | 1.72M | 16w 1d 08h 00m 00s | 160% | 27.19M | 5.49M |
English