Their experiments with metals have helped your alchemists make a light and durable material suitable for making plates that can be used to cover vulnerable spots in your ranged warriors' armor. This upgrade will increase your Sea Witches' defense.
| Level | Food | Lumber | Stone | Silver | Gold | Time | Requirements | Their experiments with metals have helped your alchemists make a light and durable material suitable for making plates that can be used to cover vulnerable spots in your ranged warriors' armor. This upgrade will increase your Sea Witches' defense. | Power | Hero's Experience |
| 1 | 15.5M | 18.5M | 12.5M | 31M | 62K | 06h 30m 00s | 1% | 100K | 260K | |
| 2 | 16M | 19M | 13M | 32M | 99.5K | 18h 00m 00s | Alchemical Laboratory 27 | 15% | 5.35M | 315K |
| 3 | 17.5M | 20.5M | 14M | 34.5M | 140K | 2d 00h 00m 00s | Alchemical Laboratory 27 | 30% | 11M | 375K |
| 4 | 21.5M | 25.5M | 17M | 42.5M | 190K | 1d 00h 00m 00s | 47% | 18.5M | 450K | |
| 5 | 32M | 38.5M | 25.5M | 63.5M | 265K | 2w 3d 00h 00m 00s | Alchemical Laboratory 28 | 67.5% | 28.5M | 555K |
| 6 | 53.5M | 64.5M | 43M | 110M | 380K | 5w 3d 00h 00m 00s | Alchemical Laboratory 29 | 91.5% | 44M | 720K |
| 7 | 92.5M | 115M | 74M | 185M | 555K | 10w 6d 00h 00m 00s | Alchemical Laboratory 29 | 120% | 68.5M | 975K |
| 8 | 160M | 190M | 130M | 315M | 815K | 19w 6d 00h 00m 00s | 155% | 110M | 1.4M | |
| 9 | 255M | 310M | 205M | 510M | 1.2M | 33w 3d 00h 00m 00s | Alchemical Laboratory 30 | 200% | 160M | 1.95M |
| 10 | 400M | 480M | 320M | 795M | 1.75M | 53w 2d 00h 00m 00s> 1 Year(s) | 250% | 235M | 2.7M | |
| 1.06B | 1.28B | 854M | 2.12B | 5.46M | 125w 6d 00h 30m 00s> 2 Year(s) | 250% | 680.95M | 9.7M |
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