Dwarven Forge

The Dwarven Forge is a forge area where you take a plain Mithril Helm and turn it into one that increases your stats, like the other pieces of Mythril. It also can take 2 pieces of the exact type, and upgrade them to the next possible class(2 fines into a blessed for example).

For the helm part basically you take a piece you found from Odin, like a Blessed Precision gloves, and forge it with the helm that you find in the desert. It takes 36 hours but when you're done you have a Blessed Precision Mythril Helm.

And for upgrading items, just take 2 of the exact same item, and they will do the same thing, upgrade it to the next possible item. Note you can't upgrade 2 Supreme pieces into something else, because it doesn't exist.