At the Blacksmiths' Guild, Iron is transformed into more sought-after Cast Iron, which is used for improving the Order Citadel. Upgrading the Blacksmiths' Guild speeds up processing and increases the quantity of the resource that is produced.
| Level | Time | Iron | Silver | Planks | Marble | Rations | Tokens | Drafts | Requirements | Order Citadel Power | Maximum of resource received | Transformation Speed | Transformation Cost |
| 1 | 1w 3d 00h 00m 00s | 15 000 000 | 10 000 000 | 2 000 | 2 000 | 2 500 | 100 | Joiners' Guild 1 | 62 000 000 | 2 000 | 0% | 0% | |
| 2 | 2w 1d 00h 00m 00s | 3 950 | 3 950 | 4 900 | 1 400 | 125 | Joiners' Guild 2 | 86 500 000 | 2 000 | 2% | 1% | ||
| 3 | 6w 2d 00h 00m 00s | 31 400 | 31 400 | 39 200 | 11 000 | 150 | Joiners' Guild 3 | 125 000 000 | 2 000 | 4% | 2% | ||
| 4 | 9w 5d 00h 00m 00s | 34 000 | 34 000 | 42 500 | 12 000 | 185 | Joiners' Guild 4 | 170 000 000 | 2 000 | 7% | 3% | ||
| 19w 4d 00h 00m 00s | 15 000 000 | 10 000 000 | 71 350 | 71 350 | 89 100 | 24 400 | 560 | 443 500 000 |
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