Attuned

You can Attune an item at a Stone of Change

Any equippable item (except quivers) can be placed into a Stone of Change with a number of Khyber Dragonshard Fragments to bind the item to the user and prepare it for the later addition of Eldritch Rituals. Binding and attuning an item requires (minimum level of item ^ 2) Khyber Dragonshard Fragments, so a minimum level 12 item would require 144 fragments. An item that is bound never takes permanent item damage when repaired, but can no longer be traded.

Note that there is a bug for items without a minimum level (i.e. minimum level 1) which makes them require 400 fragments instead of 1.