This is also a popular choice for players who are power-levelling Smithing at places such as the Blast Furnace and is considered to be one of the fastest methods of levelling Smithing in game. Also, you can buy the mithril ore and coal yourself and smith mithril bars using the Blast Furnace. A profit can be made making bolts from the bars and adding feathers and then selling them. Also, you can make them into Emerald bolts and enchant them for even more money.