upgrade items??!?!

Loki Mundane

Diabloii.Net Member
upgrade items??!?!

I have read many a times about how people have "up'ed" their items but have searched and searched and have not been able to find out how this is done.
I am assuming it is done with the item, the cube, and some other items.
Could someone explain this to me or point me in the right direction?
thank you
 
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