Smith

Smith is usually an abbreviation for "blacksmith", but can refer to many different types of metal-crafting trades. Most smithing vendors should have the ability to repair. Blacksmiths utilize their expertise with hammer and anvil to craft deadly weapons, heavy suits of mail and plate armor, and other, more specialized items. Talented blacksmiths can also modify their own equipment by adding sockets for magical gems. The gear that they make allows them to outfit themselves, equip party members or guildmates, and sell their craftsmanship via the auction house.

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NPC trainers and vendors have several common titles you can identify them with. A few mobs even have smithing titles.