UPGRADES
| LEVEL | DEFENSE | DURABILITY | RECIPE |
| Level 0 | 15 | 300 | 4x  3x  |
| Level 1 | 16 | 300 | 1x  1x 1x 1x  |
| Level 2 | 17 | 300 | 1x 1x 1x |
| Level 3 | 18 | 300 | 1x 1x 1x 2x |
| Level 4 | 19 | 300 | 1x 1x 1x |
| Level 5 | 20 | 300 | 1x 2x 2x 1x  |
| Level 6 | 21 | 300 | 1x 2x 2x |
| Level 7 | 22 | 300 | 1x 2x 2x 2x |
| Level 8 | 23 | 300 | 1x 2x 2x |
| Level 9 | 25 | 300 | 1x 2x 2x 3x |
| Level 10 | 26 | 300 | 1x 4x 3x 4x |