The Blacksmith appears similar to the base game's armorer villager, however, the eyes covers on the mask are bright purple, the metal mask is now covering their eyes, and their apron has a bright purple pattern in the middle. They also do not have sleeves.
The blacksmith is able to upgrade items in exchange for emeralds. In order to do this, the player must sacrifice the item to the Blacksmith. After completing three missions, the player gets the upgraded weapon. The power level of the upgraded item will be determined by the difficulty of the three missions the player completed as well as the player’s power level whilst being upgraded. Although all enchantments on the item are removed, the choices of available enchantments will be the same as those of the original item.
The Blacksmith can also be seen with their old texture in the Redstone Mines.
The amount of Emeralds required to upgrade an item depends on its rarity, costing the least with Common items, and costing the most with Gilded items. Gilded items cost about three times as much as the same gear without being gilded.
The amount of Emeralds also depend on the type of the item, costing the most with artifacts. And also depend on how many times the item has been upgraded before.
Out of all the merchants, the blacksmith is found at the farthest of their respective captured location which is after the player defeats the Redstone Golem.