Los herreros reforzarán el revestimiento de los Krakens con placas de metal para aumentar la solidez de estas máquinas de combate. Este Estudio aumentará la defensa de los Krakens.
| Nivel | Comida | Madera | Hierro | Piedra | Plata | Oro | Tiempo | Requisitos | Defensa de Krakens aumentada | Poder | Experiencia del Héroe |
| 1 | 4.5M | 4.5M | 4.5M | 4.5M | 4.5M | 165K | 8w 4d 00h 00m 00s | 1% | 300K | 130K | |
| 2 | 9M | 9M | 9M | 9M | 9M | 225K | 12w 6d 00h 00m 00s | 9% | 680K | 150K | |
| 3 | 18M | 18M | 18M | 18M | 18M | 310K | 19w 2d 00h 00m 00s | 17% | 1.55M | 170K | |
| 4 | 36M | 36M | 36M | 36M | 36M | 430K | 29w 00h 00m 00s | 25% | 3.5M | 200K | |
| 5 | 72M | 72M | 72M | 72M | 72M | 595K | 43w 3d 00h 00m 00s | 33% | 7.8M | 230K | |
| 6 | 145M | 145M | 145M | 145M | 145M | 835K | 65w 1d 00h 00m 00s> 1 Año(s) | 41.5% | 18M | 270K | |
| 7 | 290M | 290M | 290M | 290M | 290M | 1.2M | 97w 5d 00h 00m 00s> 1 Año(s) | 50.5% | 40M | 325K | |
| 8 | 580M | 580M | 580M | 580M | 580M | 1.7M | 146w 4d 00h 00m 00s> 2 Año(s) | 61.5% | 90M | 385K | |
| 9 | 1.2B | 1.2B | 1.2B | 1.2B | 1.2B | 2.35M | 219w 5d 00h 00m 00s> 4 Año(s) | 76.5% | 205M | 455K | |
| 10 | 2.35B | 2.35B | 2.35B | 2.35B | 2.35B | 3.35M | 329w 4d 00h 00m 00s> 6 Año(s) | 100% | 460M | 545K | |
| 4.7B | 4.7B | 4.7B | 4.7B | 4.7B | 11.16M | 971w 6d 00h 00m 00s> 18 Año(s) | 100% | 826.83M | 2.86M |
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