Cast Iron Ingot Mold
The mold takes exactly 100 units to fill, which is one pot's worth from a Crucible furnace or a matching pour from a canal, and it gives back one ingot once the cast has hardened. Pull it with an empty hand while it is still liquid and it burns; wait for it to cool, or carry it in the active hotbar slot the moment it is poured so it cannot spill.

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