A Mind bar is made during and after the Elemental Workshop II quest in the Elemental Workshop in Seers' Village. The bar may be created by placing a primed bar into the extractor gun found in the mind room and operating the machinery. Doing so will reduce the player's Magic level by 20.
The bar may be smithed into a mind helmet, mind shield or mind body by using it on the anvil in the first level of the Elemental Workshop while carrying a hammer and a beaten book (for helmets), slashed book (for shields) or a ragged book (for bodies). It can also be smithed into a pair of mind gloves or mind boots. Helmets, shields, gloves and boots require only 1 bar to be made, but two bars are required to smith the bodies.