blacksmith_id (primary) | blacksmith_name (varchar) | item_tags [json] | blacksmith_lvl (int)

Iron:daggers:curved
Iron:daggers:poisoned
Steel:daggers:curved
Golden:swords:curved
... etc

["iron:daggers:curved","iron_daggers:poisoned","steel:daggers:curved"]

{"i0":{"lvl1":"iron","lvl2":"daggers","lvl3":curved},"i1":{"lvl1":"iron","lvl2":"daggers","lvl3":"poisoned"}}